# Pre-Algebra Examples

The area of a circle is equal to Pi times the radius squared.

Substitute in the value of the radius into the formula for the area of a circle. Pi is approximately equal to .

One to any power is one.

Multiply by .

The area of a circle is equal to Pi times the radius squared.

Substitute in the value of the radius into the formula for the area of a circle. Pi is approximately equal to .

One to any power is one.

Multiply by .

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