Pre-Algebra Examples



$\begin{array}{r} r = & 1.23 \end{array}$

Step 1

The area of a circle is equal to Pi

$π$ times the radius

$r$ squared.

$π \cdot {(r a d i u s)}^{2}$

Step 2

Substitute in the value of the radius

$r = 1.23$ into the formula for the area of a circle. Pi

$π$ is approximately equal to

$3.14$ .

$π \cdot {1.23}^{2}$

Step 3

Raise

$1.23$ to the power of

$2$ .

$π \cdot 1.5129$

Step 4

Multiply

$π$ by

$1.5129$ .

$4.75291552$

 $\begin{array}{r} r = & 1.23 \end{array}$

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