$\"\"$

The length of a = 16, b = 63 and hypotenuse c = ?.

Apply pythagorean theorem: $\"\"$ .

$\"\"$ (Substitute a = 16, and b = 63)

Evaluate powers: $\"\"$ .

$\"\"$

Apply square roots property: $\"\"$ then $\"\"$ .

$\"\"$

$\"\"$ (Evaluate power: $\"\"$ )

The positive value of c = 65. $\"\"$

The hypotenuse of $\"\"$ .