1 year ago

The area of a circle is 9π m². What is the circumference, in meters? Express answer in terms of π

Mathematics

1 answer:

ad-work [718]1 year ago

8 0

Answer:

20.25 pi

Step-by-step explanation:

The circumference of a circle is given by

C = 2 * pi *r

9 pi = 2 * pi *r

Divide each side by 2pi

9pi / 2 pi = 2 pi r / 2 pi

4.5 = r

Now we can find area

A = pi r^2

= pi ( 4.5)^2

20.25 pi

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