Question

These figures are similar. The area of one is given. Find the area of the other.

15in and 21in
Area=196in^2

Answer 1

100

Explanation:

The ratio of the area is the square of the ratio of the length of the sides.

ratio of lengths of sides: 15/21 = 5/7

ratio of areas: (5/7)² = 25/49

196 in.² × 25/49 = 100 in.²