Posted by **CAITLIN D.** on Sunday, May 17, 2009 at 8:49am.

The exterior angle of a regular polygon is the angle formed by an extended side and the adjacent side.

a)what is the measure of each interior angel of a regular pentagon.

(There is apicture on the page and each side measures 21mm)

Help please.

- MATH -
**drwls**, Sunday, May 17, 2009 at 9:32am
As I said in response to a previous question, the sum of the exterior angles is 360 degrees. If all N angles are the same (as in the case of a regular polygon), divided 360 by N for the exterior angle of each.

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