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

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1
Jun 22, 2018

$A = \pi \cdot {r}^{2}$

#### Explanation:

The radius of the circle: $r = \text{10 cm}$

So

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

Then teach the underlying concepts
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Jim G. Share
Jun 22, 2018

$\text{area "=100pi~~314.16" to 2 dec. places}$

#### Explanation:

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

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

$\text{here "r=10" thus}$

$A = \pi \times {10}^{2} = 100 \pi \approx 314.16 {\text{ units}}^{2}$

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