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# Polygon

A polygon is a 2-Dimensional plane figure which is made up of straight lines. A polygon is always a closed figure. The word “Polygon” comes from Greek, where poly means many and gon means angle.

## Types of Polygon

Regular Polygon –   A polygon with all the sides and angles equal is a regular polygon.

Irregular Polygon – A polygon in which none of the sides and angles are equal.

Concave Polygon If any of the internal angle of a polygon is greater than 180⁰ than it is a concave polygon.

Convex Polygon – In a convex polygon none of the angle is greater than 180⁰ that means it has no angle pointing inwards.

Simple Polygon – It has one boundary and does not cross over itself.

Complex Polygon – A complex polygon intersects with itself.

## Different Types of Polygon

Polygon is generally named after the numbers of sides, n-sides.

 Triangle 3 60⁰ Quadrilateral 4 90⁰ Polygon 5 108⁰ Hexagon 6 120⁰ Heptagon 7 128.57⁰ Octagon 8 135⁰ Nonagon 9 140⁰ Decagon 10 144⁰ Hendecagon 11 147.27⁰ Dodecagon 12 150⁰
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