anonymous
  • anonymous
What is the area of a circle if the diameter is 12 feet?? Answers: a. 113.0 ft² b. 124.8 ft² c. 37.7 ft² d. 452.2 ft²
Mathematics
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anonymous
  • anonymous
What is the area of a circle if the diameter is 12 feet?? Answers: a. 113.0 ft² b. 124.8 ft² c. 37.7 ft² d. 452.2 ft²
Mathematics
jamiebookeater
  • jamiebookeater
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cgreenwade2000
  • cgreenwade2000
Area of a circle is A= (pi)*r^2
hartnn
  • hartnn
\[A =\pi d^2/4\] just plug in d =12
anonymous
  • anonymous

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hartnn
  • hartnn
welcome ^_^
anonymous
  • anonymous
So its 3.14*144 = 452.16/4???
hartnn
  • hartnn
you forgot to divide by 4.
cgreenwade2000
  • cgreenwade2000
|dw:1358452844870:dw|
cgreenwade2000
  • cgreenwade2000
Diameter is 2*r
hartnn
  • hartnn
3.14*144 /4=
anonymous
  • anonymous
?So no dividing??? I'm confused!! I just multiply by 2 or do I also divide by 4
anonymous
  • anonymous
yea divide by 4
anonymous
  • anonymous
Ok.... Idk who is right, @hartnn , @cgreenwade2000 , or @GiGIgo3
hartnn
  • hartnn
when you put d=12 you get A = 3.14 *144/4 = 113.0 that would be the answer :)
anonymous
  • anonymous
solve this 12x12=???.? ???.?x3.14 = ???? ???? / 4 = your answer
hartnn
  • hartnn
follow your calculations and my formula :)
anonymous
  • anonymous
Ok. Wells that what I got but @GiGIgo3 is sayin different!
anonymous
  • anonymous
im wrong
anonymous
  • anonymous
you do divide by four, i forgot the step
anonymous
  • anonymous
Okkk....Thx guys :) :)

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