67.8k views
1 vote
Sarah says that you can use the area of a

circle to figure out its circumference, but
Dan does not agree. Who is correct?
Explain your thinking and provide an
example to support your answer.

1 Answer

3 votes

Answer:

Sarah is Correct

Explanation:

If we are given the area of a circle as 44 Square Centimeter, we know that:

Area of a Circle
=\pi r^2

Circumference of a Circle
=2\pi r

Therefore, from the area, we can obtain the value of the radius to calculate the circumference of the circle:


\pi r^2=44\\r^2=(44)/(\pi) \\r=\sqrt{(44)/(\pi) }

Therefore:

Circumference of the circle
=2\pi \sqrt{(44)/(\pi) }

=23.51 centimeters.

User Steve McLeod
by
6.9k points

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