**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

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

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:**