Exercise 6.1

Question 1:
Fill in the blanks using correct word given in the 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)

 (i) Similar
(ii) Similar
(iii) Equilateral
(iv) (a) Equal
(b) Proportional

Question 2:
Give two different examples of pair of
(i) Similar figures
(ii)Non-similar figures

(i) Two equilateral triangles with sides 1 cm and 2 cm

Two squares with sides 1 cm and 2 cm

(ii) Trapezium and square

Triangle and parallelogram

Question 3:
State whether the following quadrilaterals are similar or not:

 Quadrilateral PQRS and ABCD are not similar as their corresponding sides are proportional, i.e. 1:2, but their corresponding angles are not equal.