# Polygons can be CONCAVE or CONVEX CONVEX CONCAVE

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### Text of Polygons can be CONCAVE or CONVEX CONVEX CONCAVE

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• Polygons can be CONCAVE or CONVEX CONVEX CONCAVE
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• Concave and Convex Polygons If a polygon has an indentation (or cave), the polygon is called a concave polygon. Any polygon that does not have an indentation is called a convex polygon. Any two points in the interior of a convex polygon can be connected by a line segment that does not cut or cross a side of the polygon. Concave polygon Convex polygon We will only be discussing CONCAVE polygons
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• Triangle Quadrilateral Pentagon Hexagon Heptagon Octagon Nonagon Decagon Dodecagon n-gon Hendecagon
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• F AB C DE Important Terms A VERTEX is the point of intersection of two sides A segment whose endpoints are two nonconsecutive vertices is called a DIAGONAL. CONSECUTIVE VERTICES are two endpoints of any side. Sides that share a vertex are called CONSECUTIVE SIDES.
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• Tear off two vertices.
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• Line up the 3 angles (all vertices touching)
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• A straight line = 180
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• Angle sum of a Triangle 180

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