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Find the Area circle (20)

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

Step 1

The area of a circle is equal to Pi $π$ times the radius $r$ squared.

$π \cdot {(r a d i u s)}^{2}$

Step 2

Substitute in the value of the radius $r = 20$ into the formula for the area of a circle. Pi $π$ is approximately equal to $3.14$ .

$π \cdot 20^{2}$

Step 3

Raise $20$ to the power of $2$ .

$π \cdot 400$

Step 4

Move $400$ to the left of $π$ .

$400 π$

Step 5

The result can be shown in multiple forms.

Exact Form:

$400 π$

Decimal Form:

$1256.63706143 \dots$

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