## The area of a circle is 81π m². What is the circumference, in meters? Express your answer in terms of π.

Question

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## Answers ( )

Answer:Step-by-step explanation:to find the circumference we need to find the radius of the circle.

For this, we use the formula for the area :

where is the area, is a constant and is the radius.

we know that the area is:

so we substitue this into the previous formula:

and we solve for :

the radius is 9 meters.

Now we use the formula for circumference of a circle:

and substitute the value that we’ve just found for r:

the answer in terms of is meters is the circumference

Answer:

18πm Hope this helps (: <3