Apolygon has 10 sides. what is the measure of the interior angles of the polygon?

Example 1: Find the interior angle sum of a decagon. A decagon has 10 sides, so: Example 2: Find the exterior angle sums, one exterior angle at each vertex, of aconvex nonagon. The sum of the exterior angles of any convex polygon is 360°.

Each angle is 1440/10 = 144deg
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