mayrabris2cute
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



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cgreenwade2000
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Area of a circle is
A= (pi)*r^2

hartnn
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\[A =\pi d^2/4\]
just plug in d =12

mayrabris2cute
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Thx @hartnn

hartnn
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welcome ^_^

mayrabris2cute
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So its 3.14*144 = 452.16/4???

hartnn
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you forgot to divide by 4.

cgreenwade2000
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dw:1358452844870:dw

cgreenwade2000
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Diameter is 2*r

hartnn
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3.14*144 /4=

mayrabris2cute
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?So no dividing??? I'm confused!! I just multiply by 2 or do I also divide by 4

GiGIgo3
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yea divide by 4

mayrabris2cute
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Ok.... Idk who is right, @hartnn , @cgreenwade2000 , or @GiGIgo3

hartnn
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when you put d=12
you get A = 3.14 *144/4 = 113.0
that would be the answer :)

GiGIgo3
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solve this
12x12=???.?
???.?x3.14 = ????
???? / 4 = your answer

hartnn
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follow your calculations and my formula :)

mayrabris2cute
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Ok. Wells that what I got but @GiGIgo3 is sayin different!

GiGIgo3
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im wrong

GiGIgo3
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you do divide by four, i forgot the step

mayrabris2cute
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Okkk....Thx guys :) :)