Question

2 triangles are shown. The first triangle has side lengths 15, 15, and 21. The second triangle has side lengths 20, 20, x.What value of x will make the triangles similar by the SSS similarity theorem? x =

Answer 1

x=28

Explanation:

Answer 2

28

Explanation:

The ratio of the sides must be the same

15 21

------ = ----------

20 x

Using cross products

15x = 20*21

Divide each side by 15

15x/15 = 20*21/15

x =28