Question 1026248
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Write a letter to Abe, who missed math class, explaining how he can determine the sum of the interior and exterior angels in a decagon?
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Dear Abe, how are you? Hope everything is OK with you.


Regarding the sum of interior angles of a polygon, you can read on this subject from the lesson
<A HREF=https://www.algebra.com/algebra/homework/Polygons/Sum-of-interior-angles-of-a-polygon.lesson>Sum of interior angles of a polygon</A>  in the site <A HREF=https:\\www.algebra.com>https:\\www.algebra.com</A>.

Specifically for the sum of interior angles of a decagon (polygon with 10 sides and/or 10 vertices), 
it is equal to 1440°.  It is explained in the same lesson, Example 1.

I am looking forward to see you in the school tomorrow.
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