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Geometry 14 Online
OpenStudy (seedney):

How do I find the area of a nonagon? The perimeter is 126 inches.

OpenStudy (katie_rogers101):

A=9 4a2cot(180° 9)

OpenStudy (katie_rogers101):

that didn't paste well but if you google that exact question it will pull up a calculator that asks you the length of one side and will help you find your answer

OpenStudy (dumbcow):

Here is a triangle slice out of the nonagon, Find Area of it, then multiply by 9. |dw:1464917629648:dw|

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