Pre-Algebra Examples

 $\begin{array}{r} r = & 0.5 \end{array}$

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 $r = 0.5$ into the formula to find the surface area of the sphere. Pi $π$ is approximately equal to $3.14$ .

$4 \cdot π \cdot {0.5}^{2}$

Step 3

Raise $0.5$ to the power of $2$ .

$4 π \cdot 0.25$

Step 4

Multiply $4 π \cdot 0.25$ .

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Step 4.1

Multiply $0.25$ by $4$ .

$1 π$

Step 4.2

Multiply $π$ by $1$ .

$π$

Step 5

The result can be shown in multiple forms.

Exact Form:

$π$

Decimal Form:

$3.14159265 \dots$