types of quadrilaterals 1.jpg

Types of Quadrilaterals - Part 2

Trapezium

Types of Quadrilaterals - Part 3

One pair of parallel sides

AB ∥ CD

 

Parallelogram

Types of Quadrilaterals - Part 4

Opposite sides are parallel

  • AB ∥ CD
  • AD ∥ BC

 Opposite sides are equal

  • AB = CD
  • AD = BC

 

Rhombus

Types of Quadrilaterals - Part 5

Parallelogram with all sides equal

So,

  • AB ∥ CD & AD ∥ BC
  • AB = BC = CD = AD

 

Rectangle

Types of Quadrilaterals - Part 6

Parallelogram with opposite sides equal & all 4 angles 90°

So,

  • AB ∥ CD & AD ∥ BC
  • AB = CD & AD = BC
  • ∠A = ∠B = ∠C = ∠D = 90°

 

Square

Types of Quadrilaterals - Part 7

Parallelogram with all sides equal & all 4 angles 90°

So,

  • AB ∥ CD & AD ∥ BC
  • AB = BC = CD = AD
  • ∠A = ∠B = ∠C = ∠D = 90°
  1. Chapter 8 Class 9 Quadrilaterals
  2. Concept wise

Transcript

One pair of parallel sides AB ∥ CD Two pairs of parallel lines AB ∥ CD AD ∥ BC Opposite two sides are equal AB = CD AD = BC Parallelogram with all sides equal & all 4 angles 90° So, AB ∥ CD & AD ∥ BC AB = BC = CD = AD ∠A = ∠B = ∠C = ∠D = 90° Parallelogram with all sides equal & all 4 angles 90° So, AB ∥ CD & AD ∥ BC AB = CD = AD = BC ∠A = ∠B = ∠C = ∠D = 90° Parallelogram with all sides equal & all 4 angles 90° So, AB ∥ CD & AD ∥ BC AB = BC = CD = AD ∠A = ∠B = ∠C = ∠D = 90°

About the Author

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Davneet Singh
Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 10 years. He provides courses for Maths and Science at Teachoo.