# Pre-Algebra Examples

The surface area of a pyramid is equal to the sum of the areas of each side of the pyramid. The base of the pyramid has area , and and represent the slant height on the length and slant height on the width.

Substitute the values of the length , the width , and the height into the formula for surface area of a pyramid.

Multiply by .

Apply the product rule to .

Raise to the power of .

Raise to the power of .

Raise to the power of .

To write as a fraction with a common denominator, multiply by .

Write each expression with a common denominator of , by multiplying each by an appropriate factor of .

Combine.

Multiply by .

Combine the numerators over the common denominator.

Simplify the numerator.

Multiply by .

Add and .

Rewrite as .

Simplify the denominator.

Rewrite as .

Pull terms out from under the radical.

The absolute value is the distance between a number and zero. The distance between and is .

Cancel the common factor of .

Cancel the common factor.

Rewrite the expression.

Divide by .

One to any power is one.

Raise to the power of .

Add and .

Calculate the approximate solution to decimal places.