NCERT Solutions for Class 6 Maths Chapter 5 Understanding Elementary Shapes

Q: What is the number of corners in a triangular prism?

A triangular prism has six corners, also known as vertices. In a triangular prism, there are three vertices at the top triangle and three vertices at the bottom triangle. These vertices are connected by edges to form the prism.

Q: What is the measure of each angle of a rectangle?

In a rectangle, each angle measures 90 degrees. A rectangle is a quadrilateral with four right angles (90-degree angles). The opposite sides of a rectangle are parallel, and all four angles are equal, measuring 90 degrees each. This property of rectangles makes them useful for various geometric and architectural applications. Students can study understanding elementary shapes class 6 pdf after downloading form the website.

Q: A triangle is having three equal sides. What is the measure of their angle?

If a triangle has three equal sides, it is called an equilateral triangle. In an equilateral triangle, all three angles are equal. Since the sum of angles in any triangle is always 180 degrees, each angle of an equilateral triangle measures 60 degrees. Also these concepts are discussed in class 6 maths chapter 5 pdf which can be downloaded from careers360 website.

Q: How many exercise are given in Understanding Elementary Shapes Class 6 Maths NCERT Chapter

There are 9 exercise solved in the maths class 6 chapter 5 Understanding Elementary Shapes.

NCERT Solutions for Class 6 Maths Chapter 5 Understanding Elementary Shapes

Edited By Ramraj Saini | Updated on Dec 04, 2023 03:18 PM IST

NCERT Solutions for Class 6 Maths Chapter 5 Understanding Elementary Shapes provided here. 6 Class students can access NCERT Class 6 Maths solutions chapter 5 in this article. All the shapes that you see around yourself are formed using lines and curves. Class 6 NCERT Maths solutions chapter 5 are covering problems related to line segments, circle and other shapes. NCERT Maths Class 6 chapter 5 solutions are prepared, based on the problems available in NCERT Class 6 Syllabus.

Latest: Important Maths Formulas for Class 6 - Chapterwise

This Story also Contains

NCERT Solutions for Class 6 Maths Chapter 5 - Important Formulae And Points
NCERT Solutions for Class 6 Maths Chapter 5 Understanding Elementary Shapes (Intext Questions and Exercise)
NCERT solutions for class 6 maths topic: angles
NCERT Solutions for Class 6 Mathematics Chapter Wise
How to Use NCERT Solutions for Class 6 Maths Chapter 5 Understanding Elementary Shapes?
NCERT Solutions for Class 6 - Subject Wise

$NCERT Solutions for Class 6 Maths Chapter 5 Understanding Elementary Shapes$

NCERT Solutions for Class 6 Maths Chapter 5 Understanding Elementary Shapes

It is one of the most important chapters of this Class as well as of the geometry part. So students should prepare well and refer to NCERT solutions for Class 6 Maths chapter 5, in case of any doubt. CBSE NCERT Class 6 Maths solutions chapter 5 is covering the solution of all the subtopics. In this chapter of NCERT, there are 45 questions in 9 exercises. NCERT Maths Class 6 chapter 5 solutions to all these 45 problems are covered and provided below. Check NCERT Solutions for other classes and subjects.
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NCERT Solutions for Class 6 Maths Chapter 5 - Important Formulae And Points

Straight angle = 180 degrees and right angle = 90 degrees.
Acute angle: When an angle is smaller than a right angle, we call it an acute angle.
Obtuse angle: When an angle is bigger than a right angle but smaller than a straight angle, we call it an obtuse angle.
Reflex angle: When an angle is larger than a straight angle, we call it a reflex angle.
Sum of interior angles of a triangle=180 degree
Sum of all interior angles of a polygon with n side=(n - 2)180 degrees

Triangle And Its Type

Based on	Triangle Name	Description
Sides	Scalene triangle	All three sides are unequal.
	Isosceles triangle	Any two sides are equal.
	Equilateral triangle	All three sides are equal.
Angles	Acute angled triangle	All the angles are acute.
	Right-angled triangle	Anyone's angle is the right angle.
	Obtuse angled triangle	Anyone's angle is obtuse.

Quadrilaterals

Quadrilateral Type	Property
Rhombus	All four sides are of equal length.
Square	It is a rhombus with four right angles.
Parallelogram	It has two pairs of parallel sides.
Rectangle	It is a parallelogram with four right angles.
Trapezium	It has one pair of parallel sides.

Polygons

Polygon Name	No. of Sides
Triangle	3
Quadrilateral	4
Pentagon	5
Hexagon	6
Heptagon	7
Octagon	8
Nonagon	9
Decagon	10

NCERT Solutions for Class 6 Maths Chapter 5 Understanding Elementary Shapes

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NCERT Solutions for Class 6 Maths Chapter 5 Understanding Elementary Shapes (Intext Questions and Exercise)

NCERT Solutions for Class 6 Maths Chapter 5 Understanding Elementary Shapes Exercise: 5.1

Q1 What is the disadvantage in comparing line segments by mere observation?

Answer: The disadvantage in comparing line segments by mere observation is that our estimation may be inaccurate and therefore a divider must be used.

Q2 Why is it better to use a divider than a ruler, while measuring the length of a line segment?

Answer: While measuring the length of a line segment using error might creep in due to the thickness and translucency of the ruler and because of angular viewing. We can get rid of these errors using a divider.

Q3 Draw any line segment, say AB. Take any point C lying in between A and B. Measure the lengths of AB, BC and AC. Is AB = AC + CB?

[Note : If A,B,C are any three points on a line such that AC + CB = AB, then we can be sure that C lies between A and B.]

Answer:

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Yes $AB=AC+CB$

Q4 If A, B, C are three points on a line such that AB = 5 cm, BC = 3 cm and AC = 8 cm, which one of them lies between the other two?

Answer: AB = 5 cm
BC = 3 cm
AC = 8 cm
Therefore AB + BC = AC
Therefore point B lies between points A and C.

Q5 Verify, whether D is the midpoint of AG.

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Answer: AD = 4 - 1 = 3
DG = 7 - 4 = 3
Therefore, AD = DG
Therefore, D is the midpoint of AG.

Q6 If B is the midpoint of AC and C is the midpoint of BD, where A, B, C, D lie on a straight line, say why AB = CD?

Answer: To Prove $:AB=CD$
B is the midpoint of AC
$\therefore \ AB=BC$ $(i)$
C is the midpoint of BD
$\therefore \ BC=CD$ $(ii)$
From (i) and (ii) we can conclude $AB=CD$
Hence proved.

Q7 Draw five triangles and measure their sides. Check in each case, if the sum of the lengths of any two sides is always less than the third side.

Answer:

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After measuring their sides we have found that the sum of lengths of any two sides of a triangle is always greater than the third side.

NCERT solutions for class 6 maths topic: angles

Q1 What is the angle name for half a revolution?

Answer: Half a revolution = $180^{\circ}$
The angle name for half a revolution is "Straight Angle".

Q2 What is the angle name for one-fourth revolution?

Answer: One-fourth revolution = $90^{\circ}$
The angle name for one-fourth revolution is "Right Angle"

Q3 Draw five other situations of one-fourth, half and three-fourth revolution on a clock.

Answer:

cluck

(a) One fourth revolution: From $3\ to\ 6$
(b) Half revolution: From $5\ to\ 11$
(c) Three fourth revolution: From $9\ to\ 6$
(d) Three fourth revolution: From $12\ to\ 9$
(e) Half fourth revolution: From $8\ to\ 2$

NCERT Solutions for Class 6 Maths Chapter 5 Understanding Elementary Shapes Exercise: 5.2

Q1 What fraction of a clockwise revolution does the hour hand of a clock turn through, when it goes from

(a) 3 to 9 (b) 4 to 7 (c) 7 to 10

(d) 12 to 9 (e) 1 to 10 (f) 6 to 3

Answer:
(a) Half.
(b) One fourth.
(c) One fourth.
(d) Three fourth.
(e) Three fourth.
(f) Three fourth.

Q2 Where will the hand of a clock stop if it
(a) starts at 12 and makes $\frac{1}{2}$ of a revolution, clockwise?
(b) starts at 2 and makes $\frac{1}{2}$ of a revolution, clockwise?
(c) starts at 5 and makes $\frac{1}{4}$ of a revolution, clockwise?
(d) starts at 5 and makes $\frac{3}{4}$ of a revolution, clockwise?

Answer:
(a) The hand of a clock will stop at 6 after starting at 12 and making $\frac{1}{2}$ of a revolution, clockwise.
(b) The hand of a clock will stop at 8 after starting at 2 and making $\frac{1}{2}$ of a revolution, clockwise.
(c) The hand of a clock will stop at 8 after starting at 5 and making $\frac{1}{4}$ of a revolution, clockwise.
(d) The hand of a clock will stop at 2 after starting at 5 and making $\frac{3}{4}$ of a revolution, clockwise.

Q3 Which direction will you face if you start facing
(a) east and make $\frac{1}{2}$ of a revolution clockwise?
(b) east and make $1\frac{1}{2}$ of a revolution clockwise?
(c) west and make $\frac{3}{4}$ of a revolution anti-clockwise?
(d) south and make one full revolution?
(Should we specify clockwise or anti-clockwise for this last question? Why not?)

Answer:
(a) West.
(b) West.
(c) North.
(d) South.
No need to specify clockwise or anti-clockwise for the last question as after one complete revolution we would be facing in the same direction.

Q4 What part of a revolution have you turned through if you stand facing
(a) east and turn clockwise to face north?
(b) south and turn clockwise to face east?
(c) west and turn clockwise to face east?

Answer:
(a) If we are standing facing east and turn clockwise to face north we have turned through $\frac{3}{4}th$ of a revolution.
(b) If we are standing facing south and turn clockwise to face east we have turned through $\frac{3}{4}th$ of a revolution.
(c) If we are standing facing west and turn clockwise to face east we have turned through half of a revolution.

Q5 Find the number of right angles turned through by the hour hand of a clock when it goes from

(a) 3 to 6 (b) 2 to 8 (c) 5 to 11

(d) 10 to 1 (e) 12 to 9 (f) 12 to 6

Answer: Number of right angles turned through by the hour hand of a clock when it goes from
(a) 3 to 6, (b) 2 to 8, (c) 5 to 11, (d) 10 to 1, (e) 12 to 9, (f) 12 to 6 are

(a) 1.
(b) 2.
(c) 2.
(d) 1.
(e) 3.
(f) 2.

Q6 How many right angles do you make if you start facing
(a) south and turn clockwise to west?
(b) north and turn anti-clockwise to east?
(c) west and turn to west?
(d) south and turn to north?

Answer: The number of right angles we can make from the given conditions are-
(a) 1.
(b) 3.
(c) 4.
(d) 2.

Q7 Where will the hour hand of a clock stop if it starts

(a) from 6 and turns through 1 right angle?

(b) from 8 and turns through 2 right angles?

(d) from 7 and turns through 2 straight angles?

Answer: (a) Starting from 6 and turns through 1 right angle the hour hand stops at 9.
(b) Starting from 8 and turns through 2 right angles the hour hand stops at 2.
(c) Starting from 10 and turns through 3 right angles the hour hand stops at 7.
(d) Starting from 7 and turns through 2 straight angles the hour hand stops at 7.

NCERT solutions for class 6 maths topic: Angles

Q1 The hour hand of a clock moves from 12 to 5. Is the revolution of the hour hand more than 1 right angle?

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Answer: Yes, the revolution of the hour hand is more than 1 right angle.
For each hour, the angle made = $\frac{360^{\circ}}{12} = 30^{\circ}$
Therefore, when the hour hand moves from 12 to 5, the angle made = $30^{\circ}\times 5= 150^{\circ}$

Q2 What does the angle made by the hour hand of the clock look like when it moves from 5 to 7. Is the angle moved more than 1 right angle?

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Answer: No, the angle is not more than than 1 right angle.
For each hour, angle made = $\frac{360^{\circ}}{12} = 30^{\circ}$
Therefore, when the hour hand moves from 5 to 7, the angle made = $30^{\circ}\times 2= 60^{\circ}$

NCERT Solutions for Class 6 Maths Chapter 5 Understanding Elementary Shapes Exercise: 5.3

Q1 Match the following

(i) Straight angle	(a) Less than one-fourth of a revolution
(ii) Right angle	(b) More than half a revolution
(iii) Acute angle	(c) Half of a revolution
(iv) Obtuse angle	(d) One-fourth of a revolution
(v) Reflex angle	(e) Between $\frac{1}{4}$ and $\frac{1}{2}$ of a revolution
	(f) One complete revolution

Answer:

(i) Straight angle	(c) Half of a revolution
(ii) Right angle	(d) One-fourth of a revolution
(iii) Acute angle	(a) Less than one-fourth of a revolution
(iv) Obtuse angle	(e) Between $\frac{1}{4}$ and $\frac{1}{2}$ of a revolution
(v) Reflex angle	(b) More than half a revolution

Q2 Classify each one of the following angles as right, straight, acute, obtuse or reflex :

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Answer:

(a) Acute.
(b) Obtuse.
(c) Right.
(d) Reflex.
(e) Straight.
(f) Acute, acute.

NCERT Solutions for Class 6 Maths Chapter 5 Understanding Elementary Shapes Exercise: 5.4

Q1 What is the measure of (i) a right angle? (ii) a straight angle?

Answer: (i) 90 ^o (ii) 180 ^o

Q2 Say True or False :

(a) The measure of an acute angle < 90°.
(b) The measure of an obtuse angle < 90°.
(c) The measure of a reflex angle > 180°.
(d) The measure of one complete revolution = 360°.
(e) If m A∠ = 53° and m B∠ = 35°, then m A∠ > m B.

Answer:

(a) True.
(b) False.
(c) True.
(d) True.
(e) True.

Q3 Write down the measures of
(a) some acute angles.
(b) some obtuse angles.
(give at least two examples of each).

Answer:

(a) 30^o, 45^o and 60^o
(b) 120^o, 135^o and 150^o

Q4 Measure the angles given below using the Protractor and write down the measure.

Measure the angles given below using the Protractor and write down the measure

Answer:

(a) 45 ^o
(b) 125 ^o
(c) 90 ^o
(d) 60 ^o , 90 ^o and 125 ^o

Q5 Which angle has a large measure? First, estimate and then measure.

1643037810581

Measure of Angle A =
Measure of Angle B =

Answer:
Measure of Angle A = 40^o
Measure of Angle B = 60^o

Q6 From these two angles which has larger measure? Estimate and then confirm by measuring them.

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Answer: By estimation followed by confirmation by measurement we know that the second angle is greater.

Q7 Fill in the blanks with acute, obtuse, right or straight :

(a) An angle whose measure is less than that of a right angle is______.
(b) An angle whose measure is greater than that of a right angle is ______.
(c) An angle whose measure is the sum of the measures of two right angles is _____.
(d) When the sum of the measures of two angles is that of a right angle, then each one of them is ______.
(e) When the sum of the measures of two angles is that of a straight angle and if one of them is acute then the other should be _______.

Answer:

(a) An angle whose measure is less than that of a right angle is acute.
(b) An angle whose measure is greater than that of a right angle is obtuse.
(c) An angle whose measure is the sum of the measures of two right angles is straight.
(d) When the sum of the measures of two angles is that of a right angle, then each one of them is acute.
(e) When the sum of the measures of two angles is that of a straight angle and if one of them is acute then the other should be obtuse.

Q8 Find the measure of the angle shown in each figure. (First estimate with your eyes and then find the actual measure with a protractor).

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Answer:

(a) Measure of the given along = 40 ^o
(b) Measure of the given along = 130 ^o
(c) Measure of the given along = 65 ^o
(d) Measure of the given along = 135 ^o

Q9 Find the angle measure between the hands of the clock in each figure :

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Answer: The angle measure between the hands of the clock in each figure is

(a) 90 ^o
(b) 30 ^o
(c) 180 ^o

Q11 Measure and classify each angle:

1643037918940

ANGLE	MEASURE	TYPE
$\angle AOB$
$\angle AOC$
$\angle BOC$
$\angle DOC$
$\angle DOA$
$\angle DOB$

Answer:

ANGLE	MEASURE	TYPE
$\angle AOB$	40 ^o	Acute Angle
$\angle AOC$	125 ^o	Obtuse Angle
$\angle BOC$	85 ^o	Acute Angle
$\angle DOC$	95 ^o	Obtuse Angle
$\angle DOA$	140 ⁰	Obtuse Angle
$\angle DOB$	180 ⁰	Straight Angle

NCERT Solutions for Class 6 Maths Chapter 5 Understanding Elementary Shapes Exercise: 5.5

Q1 Which of the following are models for perpendicular lines :

(a) The adjacent edges of a table-top.
(b) The lines of a railway track.
(c) The line segments forming the letter ‘L’.
(d) The letter V.

Answer:

(a) The adjacent edges of a table-top are models for perpendicular lines.
(b) The lines of a railway track are not models for perpendicular lines as they are parallel to each other.
(c) The line segments forming the letter ‘L’ are models for perpendicular lines.
(d) The line segments forming the letter ‘V’ are models for perpendicular lines.

Q2 Let $\overline {PQ}$ be the perpendicular to the line segment $\overline {XY}$ . Let $\overline {PQ}$ and $\overline {XY}$ intersect in the point A. What is the measure of $\angle PAY$ ?

Answer: $PQ\perp XY$
PQ and XY intersect at A
$PA\perp AY$
Therefore $\angle PAY=90^{o}$

Q3 There are two set-squares in your box. What are the measures of the angles that are formed at their corners? Do they have any angle measure that is common?

Answer: The angles of the two set squares are
(i) 90^o, 60^o and 30^o
(ii) 90^o, 45 ^o, and 45^o
Yes they have the common angle measure 90 ^o

Q4 Study the diagram. The line $l$ is perpendicular to line $m$

(a) Is CE = EG?
(b) Does PE bisect CG?
(c) Identify any two line segments for which PE is the perpendicular bisector.
(d) Are these true?
- (i) AC > FG
- (ii) CD = GH
- (iii) BC < EH.

1643037947694

Answer:

(a) CE = 5 - 3 = 2 units
EG = 7 - 5 = 2 units
Therefore CE = EG.
(b) CE = EG therefore PE bisects CG.
(c) PE is the perpendicular bisector for line segments DF and BH
(d)
- (i) AC = 3 - 1 = 2 units
  FG = 7 - 6 = 1 unit
  Therefore AC > FG
  True
- (ii) CD = 4 - 3 = 1 unit
  GH = 8 - 7 = 1 unit
  Therefore CD = GH
  True
- (iii) BC = 3 - 2 = 1 unit
  EH = 8 - 5 = 3 units
  Therefore BC < EH
  True.

NCERT Solutions for Class 6 Maths Topic: Classification of Triangles

Q1 Try to draw rough sketches of

(a) a scalene acute-angled triangle.
(b) an obtuse-angled isosceles triangle.

Answer: (a) a scalene acute-angled triangle. :
Scalene: All side of different length
Acute angled: All angles less than $90^{\circ}$

acute-scalene

(b) an obtuse-angled isosceles triangle
Isosceles traingle: Only two sides are of equal length
Obtuse angled : At least one angle greater than $90^{\circ}$

obtuse-isosceles

NCERT Solutions for Class 6 Maths Chapter 5 Understanding Elementary Shapes Exercise: 5.6

Q1 Name the types of following triangles :

(a) Triangle with lengths of sides 7 cm, 8 cm and 9 cm.
(b) $\Delta ABC$ with AB = 8.7 cm, AC = 7 cm and BC = 6 cm.
(c) $\Delta PQR$ such that PQ = QR = PR = 5 cm.
(d) $\Delta DEF$ with $m\angle D=90^{\circ}$
(e) $\Delta XYZ$ with $m\angle Y=90^{\circ}$ and XY = YZ.
(f) $\Delta LMN$ with $m\angle L=30^{\circ}$ , $m\angle M=70^{\circ}$ and $m\angle N=80^{\circ}$

Answer:

(a) Scalene Triangle.
(b) Scalene Triangle.
(c) Equilateral Triangle.
(d) Right-angled Triangle.
(e) Right-angled isosceles Triangle.
(f) Acute angled Triangle.

Q2 Match the following :

Measure of triangles	Types of triangle
(i) 3 sides of equal length	(a) Scalene
(ii) 2 sides of equal length	(b) Isosceles right-angled
(iii) All sides of different length	(c) Obtuse angled
(iv) 3 acute angles	(d) Right-angled
(v) 1 right angle	(e) Equilateral
(vi) 1 obtuse angle	(f) Acute angled
(vii) 1 right angle with two sides of equal length	(g) Isosceles

Answer:

Measure of triangles	Types of triangle
(i) 3 sides of equal length	(e)Equilateral
(ii) 2 sides of equal length	(g) Isoscles
(iii) All sides of different length	(a) Scalene
(iv) 3 acute angles	(f) Acute angled
(v) 1 right angle	(d)Right angled
(vi) 1 obtuse angle	(c) Obtuse angled
(vii) 1 right angle with two sides of equal length	(b) Isoscles right angled

Q3 Name each of the following triangles in two different ways: (you may judge the nature of the angle by observation)

1643038031161

Answer:

(a)(i) Acute angled triangle.
(ii) Isosceles triangle.
(b)(i) Right-angled triangle.
(ii) Scalane triangle.
(c)(i) Obtuse angled triangle.
(ii) Isosceles triangle.
(d)(i) Right-angled triangle.
(ii) Isosceles triangle.
(e)(i) Acute angled triangle.
(ii) Equilateral triangle.
(f)(i) Obtuse angled triangle.
(ii) Scalene triangle.

NCERT Solutions for Class 6 Maths Topic: Quadrilaterals

Q1 Place a pair of unequal sticks such that they have their endpoints joined at one end. Now place another such pair meeting the free ends of the first pair. What is the figure enclosed? It is a quadrilateral, like the one you see here. The sides of the quadrilateral are AB, BC, ___, ___. There are 4 angles for this quadrilateral. They are given by ∠BAD, ∠ADC, ∠DCB and _____. BD is one diagonal. What is the other? Measure the length of the sides and the diagonals. Measure all the angles also.

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Answer: The sides of the quadrilateral are AB, BC, CD, DA
The angles are given by $\angle BAD, \angle ADC, \angle DCB \ and\ \underline{\angle ABC}$
The other diagonal is AD.

Q2 Using four unequal sticks, as you did in the above activity, see if you can form a quadrilateral such that

(a) all the four angles are acute.
(b) one of the angles is obtuse.
(c) one of the angles is right-angled.
(d) two of the angles are obtuse.
(e) two of the angles are right-angled.
(f) the diagonals are perpendicular to one another

Answer:

(a) all the four angles are acute.

(b) one of the angles is obtuse.

(d) two of the angles are obtuse.

(e) two of the angles are right-angled.

(f) the diagonals are perpendicular to one another

NCERT Solutions for Class 6 Maths Chapter 5 Understanding Elementary Shapes Exercise 5.7

Q1 Say True or False :

(a) Each angle of a rectangle is a right angle.
(b) The opposite sides of a rectangle are equal in length.
(c) The diagonals of a square are perpendicular to one another.
(d) All the sides of a rhombus are of equal length.
(e) All the sides of a parallelogram are of equal length.
(f) The opposite sides of a trapezium are parallel.

Answer:

(a) True.
(b) True.
(c) True.
(d) True.
(e) False.
(f) False.

Q2 (a) Give reasons for the following: A square can be thought of as a special rectangle.

Answer: A square can be thought of as a special rectangle as it is a rectangle only but with all sides equal.

Q2 (b) Give reasons for the following: A rectangle can be thought of as a special parallelogram.

Answer: A rectangle can be thought of as a special parallelogram as it s a parallelogram only but with all angles equal to ninety degrees.

Q2 (c) Give reasons for the following: A square can be thought of as a special rhombus.

Answer: A square can be thought of as a special rhombus because like a rhombus it has all sides equal but all its angles are also equal.

Q2 (d) Give reasons for the following: Squares, rectangles, parallelograms are all quadrilaterals.

Answer: Squares, rectangles, parallelograms are all quadrilaterals as they all have four sides.

Q2 (e) Give reasons for the following: Square is also a parallelogram.

Answer: Square is also a parallelogram as its opposite sides are parallel.

Q3 A figure is said to be regular if its sides are equal in length and angles are equal in measure. Can you identify the regular quadrilateral?

Answer: Square is the only quadrilateral with sides equal in length and angles equal in measure, therefore, a square is the regular quadrilateral.

NCERT Solutions for Class 6 Maths Chapter 5 Understanding Elementary Shapes Exercise: 5.8

Q1 Examine whether the following are polygons. If anyone among them is not, say why?

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Answer:

(a) The given figure is not a polygon as it is not a closed figure.
(b) The given figure is a polygon.
(c) The given figure is not a polygon as a polygon is enclosed only by line segments.
(d) The given figure is not a polygon as a polygon is enclosed only by line segments.

Q2 Name each polygon.

1643038095138

Make two more examples of each of these.

Answer:

(a) Quadrilateral

1643038108585

(b) Triangle

1643038121881

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(d) Octagon

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Q3 Draw a rough sketch of a regular hexagon. Connecting any three of its vertices, draw a triangle. Identify the type of triangle you have drawn.

Answer:

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We have drawn the regular Hexagon ABCDEF and by joining the vertices B, D and F we have formed the Equilateral Triangle BDF.

Q4 Draw a rough sketch of a regular octagon. (Use squared paper if you wish). Draw a rectangle by joining exactly four of the vertices of the octagon.

Answer:

1643038205449

We have made the regular octagon ABCDEFGH and by joining vertices H, C, D and G we have formed the rectangle HCDG

Q5 A diagonal is a line segment that joins any two vertices of the polygon and is not a side of the polygon. Draw a rough sketch of a pentagon and draw its diagonals.

Answer:

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We have drawn the pentagon ABCDE and by joining its vertices he has drawn the diagonals AC, CE, EB, BD and DA.

NCERT Solutions of Class 6 Maths Chapter 5 Understanding Elementary Shapes Topic: Three Dimensional Shapes

Q2 A cube is a cuboid whose edges are all of equal length.

It has ______ faces.
Each face has ______ edges.
Each face has ______ vertices.

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Answer:

It has $\underline{6}$ faces. (Three pairs of parallel square faces)
Each face has $\underline{4}$ edges.
Each face has $\underline{4}$ vertices

Q3 A triangular pyramid has a triangle as its base. It is also known as a tetrahedron.

Faces : _______
Edges : _______
Corners : _______

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Answer: The number of

Faces = $4$ (All triangular faces)
Edges = $6$
Corners = $4$

Q4 A square pyramid has a square as its base.

Faces : _______
Edges : _______
Corners : _______

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Answer: In a square pyramid, the number of
Faces = $5$ (Four triangular faces and one square face)
Edges = $8$ (Four edges of the square base and other four joining at the top)
Corners = $5$

Q5 A triangular prism looks like the shape of a Kaleidoscope. It has triangles as its bases.

Faces : _______
Edges : _______
Corners : _______

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Answer:

Faces = $5$ (Two triangular faces and three square faces)
Edges = 9
Corners = $6$

NCERT Solutions for Class 6 Maths Chapter 5 Understanding Elementary Shapes Exercise: 5.9

Q1 Match the following :

(a) Cone (i) 1643038275221

(b) Sphere (ii) 1643038289847

(d) Cuboid (iv) 1643038311321

(e) Pyramid (v) 1643038322514

Answer:

(a) Cone (ii) 1643038333993

(b) Sphere (iv) 1643038343019

(d) Cuboid (iii) 1643038363118

(e) Pyramid (i) 1643038371513

Q2 What shape is (a) Your instrument box? (b) A brick? (c) A matchbox? (d) A road-roller? (e) A sweet laddu?

Answer: The shape of the following things are

(a) Your instrument box- Cuboid
(b) A brick- Cuboid
(c) A matchbox-Cuboid
(d) A road-roller- Cylinder
(e) A sweet laddu-Sphere

Understanding Elementary Shape Class 6 Maths Chapter 5-Summary

In Class 6 Maths Chapter 5, "Understanding Elementary Shapes," the following topics are covered:

Measuring Line Segment: This topic focuses on measuring the length of a line segment using a ruler or a measuring scale. Students learn how to read measurements in centimeters (cm) and millimeters (mm) and understand the concept of units of length.
Angles - 'Right' and 'Straight': Students are introduced to angles and learn about two specific types: right angles and straight angles. A right angle measures exactly 90 degrees and forms the shape of an "L." A straight angle measures exactly 180 degrees and forms a straight line.
Angles - 'Acute', 'Obtuse', and 'Reflex': This topic expands on angles by introducing acute angles, which are less than 90 degrees, and obtuse angles, which are greater than 90 degrees but less than 180 degrees. Students also learn about reflex angles, which measure greater than 180 degrees but less than 360 degrees.
Measuring Angles: Students explore how to measure and draw angles using a protractor. They understand that the measure of an angle is represented in degrees and learn how to determine the measurement of an angle accurately.
Perpendicular Line: This topic introduces the concept of perpendicular lines. Students learn that perpendicular lines are two lines that intersect at a right angle, forming four right angles at the point of intersection.
Classification of Triangles: Students learn about the classification of triangles based on their sides and angles. They study equilateral triangles (all sides and angles are equal), isosceles triangles (two sides and two angles are equal), and scalene triangles (all sides and angles are different).
Quadrilaterals: This topic focuses on quadrilaterals, which are polygons with four sides. Students learn about different types of quadrilaterals, such as squares, rectangles, parallelograms, and trapezoids. They understand the properties and characteristics of each type.
Polygons: Students delve into the concept of polygons in general, which are closed figures formed by line segments. They explore the properties of polygons and study various types, including triangles, quadrilaterals, pentagons, hexagons, and so on.
Three-Dimensional Shape: This topic introduces three-dimensional shapes, also known as solid shapes. Students learn about common three-dimensional shapes like cubes, cuboids, cylinders, cones, and spheres. They understand the distinguishing features and characteristics of each shape.

Also Check -

NCERT Books and NCERT Syllabus

NCERT Solutions for Class 6 Mathematics Chapter Wise

Chapters No.	Chapters Name
Chapter - 1	Knowing Our Numbers
Chapter - 2	Whole Numbers
Chapter - 3	Playing with Numbers
Chapter - 4	Basic Geometrical Ideas
Chapter - 5	Understanding Elementary Shapes
Chapter - 6	Integers
Chapter - 7	Fractions
Chapter - 8	Decimals
Chapter - 9	Data Handling
Chapter -10	Mensuration
Chapter -11	Algebra
Chapter -12	Ratio and Proportion
Chapter -13	Symmetry
Chapter -14	Practical Geometry

How to Use NCERT Solutions for Class 6 Maths Chapter 5 Understanding Elementary Shapes?

You must have covered the previous chapter Basic Geometrical Ideas of class 6 hindi chapter 5.
Read the conceptual text given in the NCERT textbook and then refer to NCERT Solutions for Class 6.
Learn the application of all these concepts in the problems.
When you are done with all the above three points, you can practice it.
While practicing you can utilize solutions of NCERT for Class 6 Maths chapter 5 Understanding Elementary Shapes.

NCERT Solutions for Class 6 - Subject Wise

NCERT Solutions for Class 6 Maths

NCERT Solutions for Class 6 Science

Keep learning and working hard!

Frequently Asked Questions (FAQs)

1. What is the number of corners in a triangular prism?

A triangular prism has six corners, also known as vertices. In a triangular prism, there are three vertices at the top triangle and three vertices at the bottom triangle. These vertices are connected by edges to form the prism.

2. What is the measure of each angle of a rectangle?

In a rectangle, each angle measures 90 degrees. A rectangle is a quadrilateral with four right angles (90-degree angles). The opposite sides of a rectangle are parallel, and all four angles are equal, measuring 90 degrees each. This property of rectangles makes them useful for various geometric and architectural applications. Students can study understanding elementary shapes class 6 pdf after downloading form the website.

3. A triangle is having three equal sides. What is the measure of their angle?

If a triangle has three equal sides, it is called an equilateral triangle. In an equilateral triangle, all three angles are equal. Since the sum of angles in any triangle is always 180 degrees, each angle of an equilateral triangle measures 60 degrees. Also these concepts are discussed in class 6 maths chapter 5 pdf which can be downloaded from careers360 website.

4. How many exercise are given in Understanding Elementary Shapes Class 6 Maths NCERT Chapter

There are 9 exercise solved in the maths class 6 chapter 5 Understanding Elementary Shapes.

Also Read

NCERT Solutions for Class 6 Science Chapter 3 Fibre to Fabric

NCERT Solutions for Class 6 Science Chapter 2 Components of Food

NCERT Solutions for Class 6 Science Chapter 1 Food Where Does It Come From

NCERT Solutions for Class 6 Maths Chapter 5 Understanding Elementary Shapes

NCERT Solutions for Class 6 Maths Chapter 14 Practical Geometry

NCERT Solutions for Class 6 Maths Chapter 13 Symmetry

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Option 1) $0.34\; J$	Option 2) $0.16\; J$
Option 3) $1.00\; J$	Option 4) $0.67\; J$

Option 1) $2,000 \; J - 5,000\; J$	Option 2) $200 \, \, J - 500 \, \, J$
Option 3) $2\times 10^{5}J-3\times 10^{5}J$	Option 4) $20,000 \, \, J - 50,000 \, \, J$

Option 1) $K/2\,$	Option 2) $\; K\;$
Option 3) $zero\;$	Option 4) $K/4$

Option 1) $11.2\, L\, H_{2(g)}$ at STP is produced for every mole $HCL_{(aq)}$ consumed	Option 2) $6L\, HCl_{(aq)}$ is consumed for ever $3L\, H_{2(g)}$ produced
Option 3) $33.6 L\, H_{2(g)}$ is produced regardless of temperature and pressure for every mole Al that reacts	Option 4) $67.2\, L\, H_{2(g)}$ at STP is produced for every mole Al that reacts .

Option 1) 0.02	Option 2) 3.125 × 10^-2
Option 3) 1.25 × 10^-2	Option 4) 2.5 × 10^-2

Option 1) decrease twice	Option 2) increase two fold
Option 3) remain unchanged	Option 4) be a function of the molecular mass of the substance.

Option 1) Molality	Option 2) Weight fraction of solute
Option 3) Fraction of solute present in water	Option 4) Mole fraction.

Option 1) twice that in 60 g carbon	Option 2) 6.023 × 10²²
Option 3) half that in 8 g He	Option 4) 558.5 × 6.023 × 10²³

Option 1) less than 3	Option 2) more than 3 but less than 6
Option 3) more than 6 but less than 9	Option 4) more than 9

NCERT Solutions for Class 6 Maths Chapter 5 Understanding Elementary Shapes

NCERT Solutions for Class 6 Maths Chapter 5 - Important Formulae And Points

Triangle And Its Type

Quadrilaterals

Polygons

NCERT Solutions for Class 6 Maths Chapter 5 Understanding Elementary Shapes

NCERT Solutions for Class 6 Maths Chapter 5 Understanding Elementary Shapes (Intext Questions and Exercise)

NCERT solutions for class 6 maths topic: angles

Answer:

Answer:

Answer:

Answer:

Answer:

NCERT Solutions for Class 6 Mathematics Chapter Wise

How to Use NCERT Solutions for Class 6 Maths Chapter 5 Understanding Elementary Shapes?

NCERT Solutions for Class 6 - Subject Wise

Frequently Asked Questions (FAQs)

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