Basic Math Examples



\begin{array}{r} r = & 7 cm \end{array}

$\begin{array}{r} r = & 7 cm \end{array}$

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 = 7

$r = 7$ into the formula for the area of a circle. Pi

π

$π$ is approximately equal to

3.14

$3.14$ .

π \cdot 7^{2}

$π \cdot 7^{2}$

Step 3

Raise

7

$7$ to the power of

2

$2$ .

π \cdot 49

$π \cdot 49$

Step 4

Move

49

$49$ to the left of

π

$π$ .

49 π {(cm)}^{2}

$49 π {(cm)}^{2}$