Question

The equilateral triangles shown below are similar.

What is the ratio of their side lengths?

A. 4/25
B. 2/5
C. 4/5
D. 1

Answer 1

Ratio of SIDE LENGTHS: 2/5

Ratio of PERIMETERS: 2/5

Ratio of AREAS: 4/25

i completed the quick check and these are all right :)

Answer 2

Below in bold.

Explanation:

The smaller one has side 2 and the corresponding side on the larger one is 5, so the answer is 2/5.

The individual sides and perimeter are one-dimensional, so:

The ratio of their perimeters is the same 2/5.

The ratio of their areas ( which is 2 dimensional) is 2^2/5^2 = 4/25.