Exercise 6.1 1. Fill in the blanks using correct word given in the brackets:- (i) All circles are __________. (congruent, similar) Answer: Similar (ii) All squares are __________. (similar, congruent) Answer: Similar (iii) All __________ triangles are similar. (isosceles, equilateral) Answer: Equilateral (iv) Two polygons of the same number of sides are similar, if (a) their corresponding angles are ...