You find out your a,b,and c and plug the Into the Pythagorean theorem with your number to the second power and when you add your a and b you want to find your square root and that will be what c to the second power equals

You find out your a,b,and c and plug the

Into the Pythagorean theorem in this one your c squared had a number instead of your b squared so now you’re going to subtract from both sides get your number and get the square root of it