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OpenStudy (geometry_hater):
Find the area of a regular pentagon with side length = 12 and an apothem = 3. Find the area of a regular pentagon with side length = 12 and an apothem = 3. @Mathematics
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OpenStudy (asnaseer):
|dw:1321575667068:dw|
OpenStudy (asnaseer):
area of triangle within this pentagon is half base time height:\[0.5*12*3=18\]so area of pentagon is 5 times this value.
OpenStudy (asnaseer):
as there are 5 such triangles within it
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