x is 5
Using Pythagoras' theorem
side² = hyp² – side²
x² = 13² – 12²
x² = 169 – 144
x² = 25
x = √25
x = 5
Answer:
x=5
Step-by-step explanation:
x^2 + 12^2 = 13^2
x^2 +144 = 169
x^2 = 25
