**CBSE NCERT Solutions Chapter 6 Triangles Exercise 6.3 Question 1**

**1. State which pairs of triangles are similar. Write the similarity criterion used by you for answering the question and also write the pairs of similar triangles in the symbolic form:**

**Solution ****(i)**

Therefore by AAA similarity criterion, ~

**Solution (ii) **

Therefore, by SSS similarity criterion, ~

**Solution (iii)**

These triangles are not similar because their corresponding sides are not proportional.

**Solution (iv)**

These triangles are not similar because two given sides of triangles are not proportional.

**Solution (v)**

These triangles are not similar because in , is not contained within sides AB and BC whereas, F is contained within sides DF and FE.

**Solution (vi)**

= 180 - 70 - 80 = 30 degrees

= 180 - 80 - 30 = 70 degrees

Corresponding angles of both the given triangles are equal.

Therefore, by AAA similarity criterion, ~