jazzyl884
jazzyl884 jazzyl884
  • 09-02-2015
  • Mathematics
contestada

Which is the closest approximation to the area of the circle? Use 3.14 or 22/7 to approximate π.

Which is the closest approximation to the area of the circle Use 314 or 227 to approximate π class=

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kaylagrlz12 kaylagrlz12
  • 09-02-2015
For a circle, A=[tex] \pi [/tex] [tex] r^{2} [/tex]
For this circle the radius is 18mm so when we plug it in we get A=[tex] \pi (18)^{2} [/tex]
[tex] 18^{2} = 324 [/tex] so now we have A=324[tex] \pi [/tex]
Using 3.14 as [tex] \pi [/tex] We now have A=(3.14)(324) which is equal to 1017.36
So we know that A=1017.36 
[tex] mm^{2} [/tex]
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apologiabiology
apologiabiology apologiabiology
  • 09-02-2015
area=pi times r^2

radius=18mm
pemdas
exponents first
18^2=324
pi aprox=3.14
324 times 3.14=1017.36 mm^2 or square mm
Answer Link

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