Answer: 6 feet
Step-by-step explanation: You can solve this by solving the Pythagorean Theorem:
c^2 = a^2 + b^2
In this case, the hypotenuse (C) of the equation is 10, and one of the legs (A) is 8. You then solve the following steps
10^2 = 8^2 + b^2
100 = 64 + b^2
36 = b^2
6 = b
