<PRE><B>Question 1132997</B>
i believe the answer will be 6.


if the internal angle is 80, then the external angle is 180 - 80 = 100.


so one side of the polygon will have an external angle of 100 degrees.


all the other sides of the triangle will have an external angle of 180 - 128 = 52 degrees.


the sum of the external angles of a polygon is always 360 degrees.


subtract 100 from 360 and you get 260.


divide 260 by 52 and you get 5.


there are 5 sides with an external angle of 52 degrees and 1 side with an external angle of 100 degrees for a total of 6 sides.




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