## Chapter 6 Triangles Exercise 6.1

**Question 1: Fill in the blanks using the correct word given in brackets:**

**i) All circles are**

__similar__. (congruent, similar)**ii) All squares are**

__similar__. (similar, congruent)**iii) All**

__equilateral__triangles are similar. (isosceles, equilateral)**iv) Two polygons of the same number of sides are similar, if (a) their corresponding angles are**

__equal__and (b) their corresponding sides are__proportional__. (equal, proportional)**Question 2: Give two different examples of pair of**

**i) similar figures.**

Answer:

Answer:

Circles of different radii

Squares of different sides

**ii) non-similar figures.**

**Answer:**

Square and circle

Triangle and rectangle

**Question 3: State whether the following quadrilaterals are similar or not:**

**Answer:**No. Though the pair of sides of both the quadrilaterals PQRS and ABCD are proportional, their corresponding angles are not equal. Hence, the quadrilaterals are not similar.

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