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**Exercise 6.1****Q.1. Fill in the blanks using the correct word given in brackets:****(i) All circles are _______(congruent, similar) ****(ii) All squares are _______ (similar, congruent)**

(ii) All squares are similar.

(iii) All equilateral triangles are similar.

(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.

(b) Any two squares are similar figures.

(ii) (a) A circle and a triangle are non-similar figures.

(b) An isosceles triangle and a scalene triangle are non-similar figures.

**Sol.** No, the sides of quadrilateral PQRS and ABCD are proportional but their corresponding angles are not equal.

âˆ´ These are not similar

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