A to F   G to M   N to T   U to Z   Maths Polygon A polygon is a many sided plane figure:   3 sides: Triangle 4 sides: Quadrilateral 5 sides: Pentagon 6 sides: Hexagon 7 sides: Heptagon 8 sides: Octagon 9 sides: Nonagon 10 sides: Decagon 12 sides: Dodecagon n sides: n-gon   A polygon is said to be regular if all sides are the same length and all interior angles are equal.

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