NCERT Solutions For Class 10 Maths Chapter 6 Triangles Ex 6.1 Ex 6.1 Class 10 Maths Question 1. Fill in the blanks by 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 [...]