Question

or
The figures below are similar.

8 m
2 m


What is the ratio of the area of the larger circle to the area of the smaller circle?

Write your answer as the ratio of two whole numbers separated by a colon (for example, 2:3).

Answer 1

Linear scale = 8:2 = 4:1. Area scales by the square, so area ratio = 4^2 : 1^2 = 16:1.