'a' and 'b' is the legs and 'c' is the hypotenuse
The formula is a2 + b2 = c2, which is the formula for Pythagorean Theorem
For Example, a=3 and b=4
a2 + b2 = c2 Pythagorean Theorem
32 + 42 = c2 Substitue 3 for a and 4 for b
9 + 16 = c2 Evaluate Powers
25 = c2 Add
\(\sqrt{25} = \sqrt{c^2}\) Take square root of each side
5 = c Evaluate square root
The hypotenuse for this equation is 5