Question

Shapes A and B are similar.

Shape A has area 12.25 cm² and length 3.5 cm.
Shape B has length 17.5 cm.

calculate to the area of shape B

Answer 1

306.25 cm²

Explanation:

The linear scale factor for Shape B : Shape A is:

17.5 : 3.5

17.5/3.5 = 5

The area scale factor is therefore 5² = 25

12.25 x 25 = 306.25

Therefore, the are of Shape B is 306.25 cm²