Question 390850
It states that, for any right triangle with legs {{{a}}} and {{{b}}} and hypotenuse {{{c}}} that


{{{a^2 + b^2 = c^2}}}. This is an immediate result from the Law of Cosines. Here are some Wikipedia articles about the Pythagorean theorem and the Law of Cosines:


http://en.wikipedia.org/wiki/Pythagorean_theorem
http://en.wikipedia.org/wiki/Law_of_cosines