Question

The triangles are similar. Find the value of A.

Answer 1

Answer:

10

Step-by-step explanation:

Similar triangles have proportional side lengths.

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

$\frac{8}{16}=\frac{a}{20} \\\frac{1}{2}=\frac{a}{20}$

What's half of 20? 10.

Answer 2

Answer:

D. 10 is your answer.

Step-by-step 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.