Homework Help: math

Posted by Dakota on Thursday, April 12, 2012 at 9:31pm.

tell me if I am correct. In order to find the sum of the angles in a 50-gon, you have to find the number of triangle in a petagon which is 3 therefore 50-gon would have 30 triangles. then i would take 30 X 180 which would give me 5,400 degree

math - John, Thursday, April 12, 2012 at 10:03pm
I believe to find the sum of the exterior angles of a n-sided polygon is (n-2)*180 where n is the number of sides. So for a 50-sided polygon it should be 8640 degrees. For the interior angles it is (n-2)*180/n where again n is the number of sides.
math - Steve, Friday, April 13, 2012 at 12:57pm
A small correction:

The sum of the interior angles of an n-gon is (n-2)*180.

The interior angles and the exterior angles always add up to 360.

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