Basic Math Examples



\begin{array}{r} r = & 4.5 \end{array}

$\begin{array}{r} r = & 4.5 \end{array}$

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 = 4.5

$r = 4.5$ into the formula for the area of a circle. Pi

π

$π$ is approximately equal to

3.14

$3.14$ .

π \cdot {4.5}^{2}

$π \cdot {4.5}^{2}$

Step 3

Raise

4.5

$4.5$ to the power of

2

$2$ .

π \cdot 20.25

$π \cdot 20.25$

Step 4

Multiply

π

$π$ by

20.25

$20.25$ .

63.61725123

$63.61725123$