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Sagot :
The sum of the measures of the exterior angles of a convex 21-gon is 360 degrees.
What is an exterior angle?
An exterior angle of a polygon is the angle between a side and its adjacent extended side.
Polygon is a plane figure with a finite number of straight line segments.
The sum of exterior angles of any polygon is 360 degrees.
The sum of the measures of the exterior angles of a convex 21-gon is 360 degrees.
Find out more on exterior angle at: https://brainly.com/question/2546141
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