Answer:
B. 8
Step-by-step explanation:
This is because a 6-8-10 right triangle (a variation of a 3-4-5 right triangle) is a Pythagorean Triple.
To show that the answer 8 works:
a^2+b^2 = c^2
6^2+b^2 = 10^2
36+b^2 = 100
b^2 = 64
b = sqrt64 = 8
x=8
Since this is a right triangle, we can use the Pythagorean theorem
a^2 + b^2 = c^2
6^2 + x^2 = 10 ^2
36+ x^2 = 100
Subtract 36 from each side
x^2 = 64
Take the square root of each side
x = 8
