Note that the Pythagorean Theorem only works with right triangles. You can use the Pythagorean Theorem to find the length of the hypotenuse of a right triangleif you know the length of the triangle's other two sides, called the legs. Put another way, if you know thelengths of a and b, you can find c.

.

.

.

.

.

http://www.handymath.com/cgi-bin/angle4.cgi?submit=Entry