dman2108 dman2108
  • 29-04-2017
  • Mathematics
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I need to find the circumference and area of a circle with a diameter of 20 cm

I need to find the circumference and area of a circle with a diameter of 20 cm class=

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andyouyang21
andyouyang21 andyouyang21
  • 29-04-2017
the diameter is 20 so the radius is 10.
A=πr^2
A=π10^2
A=100π

C=2πr
C=2π10
C=20π
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