Kayliereinkingh
Kayliereinkingh Kayliereinkingh
  • 04-05-2017
  • Mathematics
contestada

The exact area of a circle is 81 pi square inches what are the radius and diameter of the circle

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DariusX
DariusX DariusX
  • 04-05-2017
area is pi*r^2

so if area is 81pi, means r=9

diameter is 2*pi*r =2*pi*9=18pi
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HomeworkPotato123
HomeworkPotato123 HomeworkPotato123
  • 04-05-2017
To get the radius multiply 254.34 by 2 which is 508.68 and to get the radius you divide 254.34 by 2 and you get 127.17
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