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Answer 1

Answer:

5 sided regular polygon is pentagon

angle measure = The measure of an exterior angle of a regular pentagon is 72°, where a regular pentagon is a 5-sided polygon with sides of equal length

9 sided regular polygon is enneagon

angle measure = All sides are the same length (congruent) and all interior angles are the same size (congruent). To find the measure of the angles, we know that the sum of all the angles is 1260 degrees (from above)... And there are nine angles... So, the measure of the angle of a regular nonagon is 140 degrees.