NCERT Class 9 Maths Chapter 8 Notes Quadrilaterals - Download PDF

NCERT Class 9 Maths Chapter 8 Notes Quadrilaterals - Download PDF

Edited By Ramraj Saini | Updated on Mar 18, 2024 12:46 PM IST

The Quadrilaterals is the NCERT chapter in which The comprehensive notes for the concept of Quadrilaterals cover the following concepts in detail: Definition of Quadrilaterals, Type of Quadrilaterals, properties of Quadrilaterals. The NCERT Class 9 Math Chapter 8 Notes covers a brief outline of the chapter Quadrilaterals. The main topics covered are Quadrilaterals, Definition of Quadrilaterals, Type of Quadrilaterals, properties of Quadrilaterals, the Quadrilaterals class 9 notes with some FAQs. Class 9 math Chapter 8 notes contain important formulas. CBSE class 9 math Chapter 8 notes contain systematic explanations of topics using examples and exercises. In notes for class 9 math Chapter 8, topics are explained step by step. These topics can be downloaded from Quadrilaterals class 9 notes pdf download.

Also, students can refer,

NCERT Class 9 Math Chapter 8 Notes

Define A Quadrilaterals

Four points are joined in a particular order to obtain a closed figure called quadrilaterals.

Consider below a quadrilateral ABCD:

1648457443997

HERE sides are AB, BC, CD, and DA. and diagonal are AC, BD.

Types of The Quadrilaterals

  • Square

  • Rectangle

  • Rhombus

  • Parallelogram

  • Trapezoidal

Square: - Square has four sides equal and all sides are perpendicular to each other.

Sides are AB, BC, CD, and DA, and diagonals are AC, BD.

In the square, all the sides are perpendicular to each other, and the diagonal is also perpendicular to each other.

1648457443778

Rectangle: - Rectangle has two opposite sides equal and all sides are perpendicular to each other.

Suppose sides are AB, BC, CD, and DA and diagonals are AC, BD. All the sides are perpendicular to each other and diagonal may not be perpendicular to each other.

i.e. AB ⊥ BC, BC ⊥CD

1648457444661

Rhombus: - Rhombus have four sides equal and all sides are perpendicular to each other.

Consider AB, BC, CD, and DA as sides of a rhombus, and diagonals are AC, BD. All the sides are not perpendicular to each other and diagonal also perpendicular to each other.

i.e. CD ⊥ DA

1648457444205

Parallelogram: - Parallelograms have both opposite sides equal and parallel to each other.

Consider AB, BC, CD, and DA as sides of the parallelogram. Two opposite sides are parallel and equal to each other and the diagonal may not be equal.

1648457442456

Trapezoidal: - Trapezoidal have only one opposite side parallel to each other.

1648457444395

Significance of NCERT class 9 math Chapter 8 notes

Quadrilaterals class 9th notes will help students to understand the formulas, statements, and rules in detail.

This NCERT class 9 math Chapter 8 notes also contains previous year’s questions and NCERT textbook pdf.

These topics can also be downloaded from Class 9 math Chapter 8 notes pdf download.

NCERT solutions of class 9 subject wise

NCERT Class 9 Exemplar Solutions for Other Subjects:

NCERT Class 9 Notes Chapter wise

Articles

Get answers from students and experts

A block of mass 0.50 kg is moving with a speed of 2.00 ms-1 on a smooth surface. It strikes another mass of 1.00 kg and then they move together as a single body. The energy loss during the collision is

Option 1)

0.34\; J

Option 2)

0.16\; J

Option 3)

1.00\; J

Option 4)

0.67\; J

A person trying to lose weight by burning fat lifts a mass of 10 kg upto a height of 1 m 1000 times.  Assume that the potential energy lost each time he lowers the mass is dissipated.  How much fat will he use up considering the work done only when the weight is lifted up ?  Fat supplies 3.8×107 J of energy per kg which is converted to mechanical energy with a 20% efficiency rate.  Take g = 9.8 ms−2 :

Option 1)

2.45×10−3 kg

Option 2)

 6.45×10−3 kg

Option 3)

 9.89×10−3 kg

Option 4)

12.89×10−3 kg

 

An athlete in the olympic games covers a distance of 100 m in 10 s. His kinetic energy can be estimated to be in the range

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

A particle is projected at 600   to the horizontal with a kinetic energy K. The kinetic energy at the highest point

Option 1)

K/2\,

Option 2)

\; K\;

Option 3)

zero\;

Option 4)

K/4

In the reaction,

2Al_{(s)}+6HCL_{(aq)}\rightarrow 2Al^{3+}\, _{(aq)}+6Cl^{-}\, _{(aq)}+3H_{2(g)}

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 .

How many moles of magnesium phosphate, Mg_{3}(PO_{4})_{2} will contain 0.25 mole of oxygen atoms?

Option 1)

0.02

Option 2)

3.125 × 10-2

Option 3)

1.25 × 10-2

Option 4)

2.5 × 10-2

If we consider that 1/6, in place of 1/12, mass of carbon atom is taken to be the relative atomic mass unit, the mass of one mole of a substance will

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.

With increase of temperature, which of these changes?

Option 1)

Molality

Option 2)

Weight fraction of solute

Option 3)

Fraction of solute present in water

Option 4)

Mole fraction.

Number of atoms in 558.5 gram Fe (at. wt.of Fe = 55.85 g mol-1) is

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

A pulley of radius 2 m is rotated about its axis by a force F = (20t - 5t2) newton (where t is measured in seconds) applied tangentially. If the moment of inertia of the pulley about its axis of rotation is 10 kg m2 , the number of rotations made by the pulley before its direction of motion if reversed, is

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

Back to top