# If a circle has a radius of 9 cm how do you find the area rounded to the nearest whole number?

Jul 31, 2015

=color(blue)(254 cm^2

#### Explanation:

The area of a circle is given by formula:
color(blue)(pir^2

$\pi$ has a constant value of $3.14$

And the radius of the circle is $9 c m$

The area $= \pi {r}^{2} = 3.14 \times {\left(9\right)}^{2} c {m}^{2}$

$= 3.14 \times \left(81\right)$
$= 254.34 c {m}^{2}$
approxcolor(blue)(254 cm^2