Basic Math Examples

 $\begin{array}{r} r = \end{array}$

Step 1

The surface area of a sphere is equal to $4$ times Pi $π$ times the radius squared.

$4 π \cdot {(r a d i u s)}^{2}$

Step 2

Substitute the value of the radius $r$ into the formula to find the surface area of the sphere. Pi $π$ is approximately equal to $3.14$ .

$4 \cdot π \cdot r^{2}$

Step 3

Multiply $4 π$ by $r^{2}$ .

$4 π r^{2}$