Basic Math Examples

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\begin{matrix} r = & 13 \end{matrix}

$\begin{array}{r} r = & 13 \end{array}$

Step 1

The surface area of a sphere is equal to

4

$4$ times Pi

π

$π$ times the radius squared.

4 π \cdot {(r a d i u s)}^{2}

$4 π \cdot {(r a d i u s)}^{2}$

Step 2

Substitute the value of the radius

r = 13

$r = 13$ into the formula to find the surface area of the sphere. Pi

π

$π$ is approximately equal to

3.14

$3.14$ .

4 \cdot π \cdot 13^{2}

$4 \cdot π \cdot 13^{2}$

Step 3

Raise

13

$13$ to the power of

2

$2$ .

4 π \cdot 169

$4 π \cdot 169$

Step 4

Multiply

169

$169$ by

4

$4$ .

676 π

$676 π$

Step 5

The result can be shown in multiple forms.

Exact Form:

676 π

$676 π$

Decimal Form:

2123.71663382 \dots

$2123.71663382 \dots$