The sum of the exterior angles of a polygon always equal 360 degrees. So...
360/18 = 20 degrees
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whats the measure of a hexagon
The sum of the exterior angles of a convex polygon which has sides and one angle at each vertex is 360 degrees.
A dodecagon is a polygon that has twelve sides. A regular dodecagon has twelve internal angles of 150 degrees each.
an interior angle + and exterior = 180 Angle A: 180-30=150 Angle B: 180-60=120 Angle C: 180-90=90 Angle D: 180-120=60 SO WHATS THE ANSWER!!!?????
a shape