Basic Math Examples



\begin{matrix} r = & 4 cm \end{matrix}

$\begin{array}{r} r = & 4 cm \end{array}$

Step 1

The area of a circle is equal to Pi

π

$π$ times the radius

r

$r$ squared.

π \cdot {(r a d i u s)}^{2}

$π \cdot {(r a d i u s)}^{2}$

Step 2

Substitute in the value of the radius

r = 4

$r = 4$ into the formula for the area of a circle. Pi

π

$π$ is approximately equal to

3.14

$3.14$ .

π \cdot 4^{2}

$π \cdot 4^{2}$

Step 3

Raise

4

$4$ to the power of

2

$2$ .

π \cdot 16

$π \cdot 16$

Step 4

Move

16

$16$ to the left of

π

$π$ .

16 π {(cm)}^{2}

$16 π {(cm)}^{2}$