Question

The triangles shown are similar. What is the value of x?

A.
20

B.
5

C.
17

D.
10

Answer 1

If the triangles are similar they're the same triangle and one is just bigger than the other. You can learn from the bottom side that the triangle is bigger by 4× because 12/3=4, so just multiple 5 by 4 (because side x and 5 are the same) and get 20. So the answer is A

Answer 2

Your answer is A. XD