Basic Math Examples



\begin{matrix} r = & 2.9 \end{matrix}

$\begin{array}{r} r = & 2.9 \end{array}$

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 = 2.9

$r = 2.9$ into the formula for the area of a circle. Pi

π

$π$ is approximately equal to

3.14

$3.14$ .

π \cdot {2.9}^{2}

$π \cdot {2.9}^{2}$

Step 3

Raise

2.9

$2.9$ to the power of

2

$2$ .

π \cdot 8.41

$π \cdot 8.41$

Step 4

Multiply

π

$π$ by

8.41

$8.41$ .

26.42079421

$26.42079421$