Question

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?​

Answer 1

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