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OpenStudy (anonymous):
what is the exact area of a circle having diameter of 4 in?
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OpenStudy (serenavdw):
a= pi*r^2 the radius is half of diamter so that equals 2 3.14*2^2 3.14*4 12.56 is the area
OpenStudy (serenavdw):
12.56 inches
OpenStudy (anonymous):
12.57 inches^2
OpenStudy (serenavdw):
yup :)
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