Basic Math Examples



\begin{array}{r} r = & 11 cm \end{array}

$\begin{array}{r} r = & 11 cm \end{array}$

Step 1

The area of a circle is equal to Pi

π

$π$ times the radius

r

$r$ squared.

π \cdot {(r a d i u s)}^{2}

$π \cdot {(r a d i u s)}^{2}$

Step 2

Substitute in the value of the radius

r = 11

$r = 11$ into the formula for the area of a circle. Pi

π

$π$ is approximately equal to

3.14

$3.14$ .

π \cdot 11^{2}

$π \cdot 11^{2}$

Step 3

Raise

11

$11$ to the power of

2

$2$ .

π \cdot 121

$π \cdot 121$

Step 4

Move

121

$121$ to the left of

π

$π$ .

121 π {(cm)}^{2}

$121 π {(cm)}^{2}$