College Math II
posted by Lori on .
Show a complete solution to each problem.
Find the exact length of the side of a square whose diagonal is 3 feet.
I am having problems understanding how you figure out this problem. Can someone help me? Thanks.

Draw a square. Draw a diagonal. Let each side length be x.
The Pythagorean theorem tells you that x^2 + x^2 = 2x^2 = 3^2 = 9
Solve for x.