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A polygon is form for a close polygonal line and the space inside it and It is made for several elements:

**SIDE:** Each one of the elements that form a polygon.

**VERTEX:** The point where two sides meet to form a corner.

**ANGLE:** A space between two lines that meet in one point.

There are many kind of polygons, so we clasify them in different ways:

First classification, considering their sides, polygons can be:

**REGULARS:** The sides an the angles are equal.

**IRREGULAR:** Sides and angles are not equal.

Second classification, considering the number of sides, polygons can be:

**TRIANGLE: **Polygon with three sides.

**QUADRILATERAL: **Polygon with four sides.

**PENTAGON: **Polygon with five sides.

**HEXAGON: **Polygon with six sides.

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