Class 9 | Chapter 6 | Lines and Angles | Theorem 6.2 | Alternate interior angles theorem

09 Aug
Class 9 - Lines & Angles, , , , , ,

Theorem 6.2: If a transversal intersects two parallel lines, then each pair of alternate interior angles is equal.

Theorem 6.1
Theorem 6.3

Prerequisite

This is one of the most easy to prove and widely used theorem to prove other theorems in geometry. You must have a good understanding of transversal and vertically opposite angles. It is recommended to watch these tutorials in case you are not aware of these concepts.

Transversal Line and the important concepts related to it

 

Vertically opposite angles theorem: If two lines intersect each other, then the vertically opposite angles are equal.

 

Chapter 6 – Lines and Angles

Mathemafia Logo - 75 px=> Axioms – Lines and Angles

This playlist covers all the questions, concepts, theorems and examples of chapter 6 (Lines and Angles) of class 9, NCERT textbook. Click a thumbnail to watch the tutorial. 

Watch complete chapter on YouTube
​

Theorems

Theorem 6.1

Theorem 6.2

Theorem 6.3

Theorem 6.4

Theorem 6.5

Theorem 6.6

Theorem 6.7

Theorem 6.8

Exercise 6.1

Question 1

Question 2

Question 3

Question 4

Question 5

Question 6

Exercise 6.2

Question 1

Question 2

Question 3

Question 4

Question 5

Question 6

Exercise 6.3

Question 1

Question 2

Question 3

Question 4

Question 5

Question 6

Examples

Example 1

Example 2

Example 3

Example 4

Example 5

Example 6

Example 7

Example 8

Written by 

Mathematics is like music - Enjoy it!!!