# What is the area of a circle 10 inches in diameter?

Jul 31, 2015

approxcolor(blue)(79 square inches.

#### Explanation:

The area of a circle is given by formula:
color(blue)(pir^2
Where,
$\pi$ has a constant value of $3.14$
and $r$ denotes the radius.

The radius of the circle is , half the diameter = $\frac{d}{2} = \frac{10}{2} = 5$inches

The area $= \pi {r}^{2} = 3.14 \times {\left(5\right)}^{2}$

$= 3.14 \times \left(25\right)$

$= 78.5$ square inches.

approxcolor(blue)(79 square inches.