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Chapter 8 Class 9 Quadrilaterals

Get solutions of all NCERT Questions, Exercises and Theorems of Chapter 8 Class 9 Quadrilateral free at teachoo. Answers to all questions have been solved in an easy way, with video of each and every question.

 

In this chapter, we will learn - 

  • What is a Quadrilateral
  • Angle sum property of a quadrilateral
  • Different Types of Quadrilateral - Trapezium, Kite, Parallelogram, Rhombus, Rectangle, Square
  • Properties of Parallelogram
    • Diagonals of a parallelogram divides it into two congruent triangles  - with Proof (Theorem 8.1)
    • Opposite sides are equal in a parallelogram, and its converse  - with Proof (Theorem 8.2 and Theorem 8.3)
    • Opposite angles are equal in a parallelogram, and its converse  - with Proof (Theorem 8.4 and Theorem 8.5)
    • Diagonals of a parallelogram bisect each other, and its converse  - with Proof (Theorem 8.6 and Theorem 8.7)
  • A special condition to prove parallelogram - A quadrilateral is a parallelogram if a pair of opposite sides is equal and parallel (Theorem 8.8)
  • Mid-point Theorem, and its converse  - with Proof (Theorem 8.9 and Theorem 8.10)

 

Here, the chapter is divided into 2 parts - Concept Wise, and Serial Order Wise.

In Serial Order Wise, just like the NCERT Book - you can check exercises and examples. This is useful when you want to check a particular question.

In Concept Wise, Teachoo (टीचू) has divided the chapter into different concepts. First the concept is explained, and then the questions of that concept is done - from easy to difficult.

 

Click on a click below to get started

 

Serial order wise

  Ex 8.1
  Ex 8.2
  Examples
  Theorems

Concept wise

  Previous topics
  Definitions
  Opposite sides of parallelogram
  Opposite angles of parallelogram
  Diagonal of parallelogram
  Theorem 8.8
  Mid point theorem