please help !!
A rope 28 m long is attached to the top of a flagpole. The rope reaches a place on the ground 15 m from the base of the pole. How many meters high is the flagpole? If necessary, round your answer to the nearest tenth.

Question

please help !! 
A rope 28 m long is attached to the top of a flagpole. The rope reaches a place on the ground 15 m from the base of the pole. How many meters high is the flagpole? If necessary, round your answer to the nearest tenth.

dumbcow · Answer

Pythagorean Thm:  a^2 + b^2 = c^2
it makes a right triangle where the hypotenuse(c) is 28

x^2 + 15^2 = 28^2

x^2 = 28^2 - 15^2

x = sqrt(28^2 - 15^2)