Part A: Its literally on your paper "Pythagorean Theorem in Three Dimensions"
Part B: you would need 2 sides of the triangle to use Pythagorean Theorem or at least 1 side and 1 angle in Trigonometry. But Part B just gives 1 side being 10 ft (base).
so the triangle would look like:
10² for the base.
x² for the guy wire.
y² for the pole.
to my knowledge its not possible to find the answer of the wire with only 1 side.
