Basic Math Examples

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\begin{array}{r} r = & 9 \end{array}

$\begin{array}{r} r = & 9 \end{array}$

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 = 9

$r = 9$ 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 9^{2}

$4 \cdot π \cdot 9^{2}$

Step 3

Raise

9

$9$ to the power of

2

$2$ .

4 π \cdot 81

$4 π \cdot 81$

Step 4

Multiply

81

$81$ by

4

$4$ .

324 π

$324 π$

Step 5

The result can be shown in multiple forms.

Exact Form:

324 π

$324 π$

Decimal Form:

1017.87601976 \dots

$1017.87601976 \dots$