Fill in the blanks using the correct word given in brackets :
(i) All circles are ------------. (congruent, similar)
(ii) All squares are -----------. (similar, congruent)
(iii) All ---------- triangles are similar. (isosceles, equilateral)
(iv) Two polygons of the same number of sides are similar, if (a) their corresponding
angles are --------- and (b) their corresponding sides are -------. (equal,
proportional)
