Running from the top of a flagpole to a hook in the ground there is a rope that is 9 meters long. If

Running from the top of a flagpole to a hook in the ground there is a rope that is 9 meters long. If the hook is 4 meters from the base of the flagpole, how tall is the flagpole?

We have a right triangle, with hypotenuse of 9 and side of 4.

Using our Pythagorean Theorem calculator, we get a flagpole height of 8.063.