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Find the area and circumference of this circle

Find the area and circumference of this circle-example-1
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User Lunigorn
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If the diameter is 8.5, then the radius will be 4.25.
Area = 4.25 x 4.25 x 3.14
18.02 x 3.14
56.5828 ≈ 56.7
AREA = 56.7
Circumference = 2 x 3.14 x 4.25
6.28 x 4.25
26.69
CIRCUMFERENCE = 26.69
Hope this helps! :D
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User Jonschlinkert
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