<PRE><B>Question 248417</B>
How do find the measures of an interior angle and an exterior angle for each regular Polygon? Example.... 
Number 11. Quadrilateral
Each interior/exterior pair is supplementary.
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Number 12. Pentagon
If it is a regular pentagon each exterior angle is 360/5 = 72 degrees
The corresponding interior angles will be 180-72 = 108 degrees.
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Number 13. Dodecagon
If it is a regular regular dodecagon each exterior angle is 360/10 
= 36 degrees.  The corresponding interior angles will be 180-36 = 144 degrees.
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Cheers,
Stan H. 
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