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# Polygons Polygons. Polygon Any shape where every segment intersects exactly two others at its endpoints.

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Polygons Polygons

Polygon Any shape where every segment intersects exactly two others at its endpoints.

Naming a polygon By its vertices in consecutive order AB CD

Parts of polygons: SideVertexDiagonalPolygon Polygonal region Interior/ Exterior

Classifying by sides: 3-Triangle4-Quadrilateral5-Pentagon6-Hexagon7-Heptagon8-Octagon9-Nonagon10-Decagon n- gon

Regular Polygon Any polygon where all sides and angles are congruent

Concave or Convex : A polygon can be either concave or convex. If you can draw a lines extending all sides and not touch then it is convex.

Perimeter The sum of the lengths of its sides P = add the length of all sides

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