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.
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