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OpenStudy (anonymous):
HIII PLZ HELP ME
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OpenStudy (anonymous):
Sure what do you need
OpenStudy (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|
OpenStudy (anonymous):
The formula for area of circle is, Area equals Pi times r times r
OpenStudy (anonymous):
Try to figure out each of those circles now
OpenStudy (anonymous):
true but what does annulus mean??
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OpenStudy (anonymous):
In greek it means little ring, you must find areas of both of those radius
OpenStudy (anonymous):
so 16pi cm and 121pi cm?
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