halp

If the three sides of a right triangle are a, b, and c with a and b the two sides that include the right angle and c the hypotenuse and if the two sides have lengths 3 and 4,

then  c²  =  a² + b²     --->     c²  =  3² + 4²     --->   c²  =  9 + 16     --->     c²  =  25     --->     c  =  5