vicestra5165 vicestra5165
  • 04-05-2017
  • Mathematics
contestada

Find the area of a circle whose circumference is 8 pi m

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apologiabiology
apologiabiology apologiabiology
  • 04-05-2017
area=pir^2
circumference=2pir

given
c=8pi
c=2pir
2pir=8pi
divide both sides by 2pi
r=4


area=pir^2
are=pi4^2
area=16pi

area=16pi square meters
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midknight9
midknight9 midknight9
  • 04-05-2017
C = [tex] \pi [/tex]d
C = 8[tex] \pi [/tex]
d = 2r
8 = 2r
r = 4

A = [tex] \pi [/tex][tex] r^{2} [/tex]
A = [tex] \pi [/tex]*[tex] 4^{2} [/tex]
A = 16[tex] \pi [/tex]

Answer Link

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