The pair of figures to the right are similar. What is the ratio of the perimeters and the ratio of the areas?
15:21
The ratio of the perimeters of similar figures is equal to the ratio of their corresponding sides.
For the figures given, the ratio of their perimeters is 15:21.
The ratio of the areas of similar figures is equal to the square of the ratio of their corresponding sides.
Therefore, the ratio of their areas would be (15/21)^2 = 225/441 ≈ 0.5102.
So, the ratio of the perimeters is 15:21 and the ratio of the areas is approximately 0.5102:1.