What are the angles in a 3 4 5 triangle?3) 5 2 = 25, so the 3 4 5 right triangle ratio is satisfied Let's prove it again with a different example We are going to multiply the numbers of the ratio by a common factor of 2 1) 6 2 8 2 = 36 64 = 100 2) 10 2 = 100, so the 3 4 5 right triangle ratio is satisfied 3) This proves the ratio holds true even when scaled by a commonA right angle can be defined here as the angle formed when two straight lines cross each other in such a way that all 4 angles produced are equal The theorem also works the other way around if the lengths of the three sides a,b,c) of a triangle satisfy the above relation, then the angle between sides a and b must be of 90 degrees For instance, a triangle with sides a = 3, b = 4, c = 5
Pythagorean Triple From Wolfram Mathworld