anonymous
  • anonymous
HIII PLZ HELP ME
Mathematics
jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
Sure what do you need
anonymous
  • anonymous
Find the area of the annulus in the concentric circles (one with radius 4cm and the other with radius 11cm) shown below. Leave answer in pi form|dw:1439499583770:dw|
anonymous
  • anonymous
The formula for area of circle is, Area equals Pi times r times r

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anonymous
  • anonymous
Try to figure out each of those circles now
anonymous
  • anonymous
true but what does annulus mean??
anonymous
  • anonymous
In greek it means little ring, you must find areas of both of those radius
anonymous
  • anonymous
so 16pi cm and 121pi cm?
anonymous
  • anonymous
So Pi times 4^2 and Pi 11^2
anonymous
  • anonymous
Yes correct
anonymous
  • anonymous
yay! thanks
anonymous
  • anonymous
Medal? :)

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