If two geometrical figures are similar, their corresponding sides are:

All squares are 

Squares of all sizes are similar.

All squares are similar

The measures of the sides of a triangle are 7, 8 and 9 cm. Find the length of the largest side of a similar triangle whose shortest side is 35 cm. 

(A) 55 cm 

(B) 40 cm 

(C) 45 cm 

(D) 50 cm 

$3$ squares are represented in the following three figures. For this figure, _____statement is true.

Fill in the blank using the correct word given in the bracket.

All circles are _____ (Congruent, similar)

The angles of a triangle are in the ratio of 1 : 2 : 3. What is the measure of the smallest angle (in degrees)?

X, Y and Z are the midpoints of the sides of ∆PQR. If the perimeter of ∆XYZ is 32 units, find the perimeter of ∆PQR.

 (A) 128 units 

(B) 64 units 

(C) 96 units 

(D) 160 units 

What are congruent circles?