i am a 7th grader in A1 and need some help on a squared plus b squared = c squared a walk through

This is known as the Pytagorean Theorem. It says that, in a right triangle, the sum of the squares of the legs (a and b) = the square on the hypoteneuse (the side opposite the right angle = "c")

Here's a good website (Purplemath) that has lots of examples !!!.......http://www.purplemath.com/modules/pythagthm.htm