Question

A. 5
B. 8
C. 9
D. 12

Answer 1

D.

Explanation:

first, classic pythagoras with the smaller triangle.

3² + 4² = 25

sqrt 25 = 5

ok ok, now

5 can be turned into 15 by multiplying 3. do this with 4 and 3 to make the full triangle.

3 -> 9 (line AE)

4 -> 12 (line DE)

5 -> 15 (line AD)

Answer 2

Answer to this problem is D