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Abby is tracing circles onto a bulletin board. If the diameters of her circles are 20 cm long, what is the area of the circles? The circumference?​

User Ajit Pratap Singh
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1 Answer

19 votes
19 votes

Answer:

The circumference would be 62.83 rounded to 2 decimal places.

The area would be
314.16cm^(2).

Explanation:

Circumference:

To find the circumference we need to do
\pi x d. Pi = 3.14 x diameter = 20cm equals to 62.83cm.

Area:

To find the area we need to half the diameter first as the radius is half the diameter. 20 divided by 2 = 10cm so that will be our radius. Then we need to do
\pi x 10x^(2) =
314.16cm^(2).

Hope that helps. x

User Rivalus
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