properties of nonagon
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It is a closed figure formed by 9 sides and 9 angles.
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Answer: Nonagon
Area: ½ × perimeter × apothem
Perimeter: 9 x side
Number of vertices: 9
Number of edges: 9
Internal angle: 140°
Properties: Convex polygon, Isogonal figure, Isotoxal figure, Equilateral polygon, Cyclic
Type: Regular polygon
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