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Find the area of a circle having a circumference of 79.3. Round to the nearest tenth.

User Kasperoo
by
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1 Answer

7 votes
The area of your circle is about 500.88

Some backround info needed:

Formula for circumference: C=2(3.14)(r)
Formula for area of circle: A=3.14(r^2)
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First, you need to find the radius of the circle.
Do this by dividing pi and 2 from 79.3.

79.3 / 2 = 39.65
39.65 / 3.14 = about 12.63

The radious of the cirlce is 12.63.

Now find the area:
a = 3.14(12.63^2)

12.63 x 12.63 = about 159.51

159.51 x 3.14 = 500.883066

Round .883 to .88

User Noctiluque
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5.4k points