Question

The triangles are similar. Find the value of A.

Answer 1

10

Explanation:

Similar triangles have proportional side lengths.

Therefore, simply do side 8 to 16 as side a is to 20.

`(8)/(16)=(a)/(20)  \\(1)/(2)=(a)/(20) \\\\`

What's half of 20? 10.

Answer 2

D. 10 is your answer.

Explanation:

If you look, the triangle is twice as small as the big one, so you take the 20 and divide by 2.

20/2 = 10

D. 10 is your answer.