# Pre-Algebra Examples

The surface area of a cylinder is equal to the sum of the areas of the bases each having an area of , plus the area of the side. The area of the side is equal to the area of a rectangle with length (the circumference of the base) times the height.

Substitute the values of the radius , the height , and an approximation for into the formula.

Multiply by .

Remove parentheses around .

Raise to the power of .

Multiply by .

Multiply by .

Multiply by .

Multiply by .

Add and .