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, equilaterals).

(iv) Two triangles are similar, if heir corresponding angles are………(proportional, equal)

(v) Two triangles are similar, if their corresponding sides are………(proportional, equal)

(vi) Two polygons of the same number of sides are similar, if (a) their corresponding angles ae and (b) heir corresponding sides are………(equal, proportional)