Basic Math Examples

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\begin{matrix} r = & 20 \end{matrix}

$\begin{array}{r} r = & 20 \end{array}$

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 = 20

$r = 20$ into the formula for the area of a circle. Pi

π

$π$ is approximately equal to

3.14

$3.14$ .

π \cdot 20^{2}

$π \cdot 20^{2}$

Step 3

Raise

20

$20$ to the power of

2

$2$ .

π \cdot 400

$π \cdot 400$

Step 4

Move

400

$400$ to the left of

π

$π$ .

400 π

$400 π$

Step 5

The result can be shown in multiple forms.

Exact Form:

400 π

$400 π$

Decimal Form:

1256.63706143 \dots

$1256.63706143 \dots$