#1**+2 **

The answer would be B. 15. This is because the red triangle and the blue triangle are similar, and because 20/8 = 2.5, the red triangle is scaled to a factor of 2.5 in ratio to the blue triangle. Applying the same logic for the other leg, we get 6*2.5 = 15.

Awesomeguy Sep 14, 2020