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A polygon is a union of disjoint [[line segment]]s that is [[path-connected]].

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Types, by number of sides.

Types, by number of sides.

# There is no such mathematical entity as a one sided polygon in a plane.  (For higher dimensional analogies, see [[Mobius strip]] and [[Klein bottle]].)

# There is no such mathematical entity as a one sided polygon in a plane.  (For higher dimensional analogies, see [[Mobius strip]] and [[Klein bottle]].)