Question

What is the area of a circle with radius of 10 cm?

Answer 1

`"area "=100pi~~314.16" to 2 dec. places"`

Explanation:

`"the area (A) of a circle is calculated using the formula"`

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

`"here "r=10" thus"`

`A=pixx10^2=100pi~~314.16" units"^2`

Answer 2

`A=pi*r^2`

Explanation:

The radius of the circle: `r= "10 cm"`

So

`A= pi * ("10 cm")^2 ~~ "314.16 cm"^2`