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Mathematics 9 Online
OpenStudy (anonymous):

,Find the sum of the measures of the interior angles of a decagon. 360 1440 1620 1800

OpenStudy (anonymous):

There's a formula for calculating this. Sum of interior angles = 180*(number of angles - 2). You can visualize this as dividing a polygon into triangles. A rectangle makes 2 triangles, so it has 360 degrees. A decagon then makes 8 triangles, and 180*8 degrees.

OpenStudy (anonymous):

iight thankx

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