RegularConvex

irregular

Concave

Number Name Polygons

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Line segments linked at four vertices to create a closed figure. A 4-sided polygon.

A polygon that has all sides equal and all interior angles equal

A polygon whose sides are not all the same length or whose interior angles do not all have the same measure.

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A polygon that has all interior angles less than 180°(Result: All the vertices point 'outwards', away from the center.)

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A polygon that has one or more interior angles greater than 180°(Result: some vertices point 'inwards', towards the center.)