Question

What is the length of the side labeled x ?

Answers:
A. 1
B. 5
C. 18
D. 25

Answer 1

The answer is B, according to me

Answer 2

Hello!

rectangle triangle => Pythagore

13² = 12² + x²

169 = 144 + x²

x² = 169 - 144

x² = 25

√x² = √25

x = 5