A polygon with 9 sides is called a nonagon. A nonagon is a closed shape with nine straight sides and nine angles. It is also known as an enneagon. Each interior angle of a regular nonagon measures 140 degrees.
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Because they have 9 sides
A polygon with 9 sides and 9 vertices is a nonagon
If you mean the perimeter of the polygon, then it is 45. Since a polygon has 5 sides, you just multiply it by 9 and you get the answer.Hope that's what you meant!
A nonagon is a polygon that has 9 sides and 9 angles
It is a nonagon