# Precalculus Examples

Step 1

Use the Pythagorean theorem to find the unknown side. In any right triangle, the area of the square whose side is the hypotenuse (the side of a right triangle opposite the right angle) is equal to the sum of areas of the squares whose sides are the two legs (the two sides other than the hypotenuse).

Step 2

Solve the equation for .

Step 3

Substitute the actual values into the equation.

Step 4

Raise to the power of .

Step 5

Raise to the power of .

Step 6

Multiply by .

Step 7

Subtract from .

Step 8

Rewrite as .

Step 9

Pull terms out from under the radical, assuming positive real numbers.