Question 615183
Use the Pythagorean theorem to solve this:
The height (8ft.) and half the distance across (6ft.) are the height and base, respectively, of a right triangle.
The hypotenuse of this right triangle will give you the length (L) of PVC you want.
{{{L^2 = 6^2+8^2}}}
{{{L^2 = 36+64}}}
{{{L^2 = 100}}} Take the square root of both sides.
{{{L = 10}}}ft.