Question

The pink trapezoid is dilated by a factor of 3. The resulting image is shown in blue. What is the ratio of the perimeters of the two trapezoids? (small:large)

A) 1:2

B) 1:3

C) 1:4

D) 1:6

Answer 1

B) 1:3 

The ratio is 1 to 3

Answer 2

Solution: 1:3. The two trapezoids are similar. Therefore, the ratio of the perimeters is the same as the ratio of the side lengths.