: Matemáticas: bicentric polygon

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bicentric polygon

In geometry, a bicentric polygon is a tangential polygon (a polygon all of whose sides are tangent to an inner incircle) which is also cyclic — that is, inscribed in an outer circle that passes through each vertex of the polygon. All triangles and all regular polygons are bicentric. On the other hand, a rectangle with unequal sides is not bicentric, because no circle can be tangent to all four sides.
(Wikipedia, The Free Encyclopedia, https://en.wikipedia.org/wiki/Bicentric_polygon)

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