Answer:
(A) x = 8
Step-by-step explanation:
Pythagorean theorem:
a^2 + b^2 = c^2
a^2 = c^2 - b^2
a = sqrt(c^2 - b^2)
x = sqrt(10^2 - 6^2)
x = sqrt(100 - 36)
x = sqrt(64)
x = 8
