# How do you find the area of a circle with diameter 20in?

Apr 29, 2018

$\text{area "=100pi~~314.2" in"^2" to 1 dec. place}$

#### Explanation:

$\text{using the formula for area (A) of a circle}$

•color(white)(x)A=pir^2larrcolor(blue)"r is the radius"

$\text{here diameter "=20rArrr=20/2=10" in}$

$\Rightarrow A = \pi \times {10}^{2} = 100 \pi \approx 314.2$