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Suppose the circumference of a circle is 2 pi what is the area?
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5 votes
Suppose the circumference of a circle is 2 pi what is the area?

User Sygmoral
by
7.1k points

1 Answer

3 votes
C = 2 * pi * r

Plug in what we know:

2pi = 2 * pi * r

Divide 2 pi to both sides:

r = 1

(Remember, anything divided by itself is equal to 1)

A = pi * r^2

Plug in what we know:

A = pi * 1^2

A = pi * 1

A = 1 pi

So the area is '1 pi' or just 'pi'.
User Fredrik Stolpe
by
7.2k points
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