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Mathematics 9 Online
OpenStudy (anonymous):

Explain how the formula for the area of a regular polygon is derived from that of a triangle.

OpenStudy (inkyvoyd):

|dw:1335485962293:dw|

OpenStudy (inkyvoyd):

Now assume the pentagon is regular. THen all the triangles have equal area right?

OpenStudy (inkyvoyd):

|dw:1335486002676:dw| that line segment is called the apothem. it is also the height of the triangle.

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