Издательство: | Книга по требованию |
Дата выхода: | июль 2011 |
ISBN: | 978-6-1311-4313-7 |
Объём: | 68 страниц |
Масса: | 123 г |
Размеры(В x Ш x Т), см: | 23 x 16 x 1 |
High Quality Content by WIKIPEDIA articles! High Quality Content by WIKIPEDIA articles! In geometry, a tetrakaidecagon (or tetradecagon) is a polygon with 14 sides and angles.The regular tetradecagon is the Petrie polygon for four higher dimensional polytopes. A regular tetradecagon can't be constructed using compass and straightedge. In geometry, a Petrie polygon for a regular polytope of n dimensions is a skew polygon such that every (n-1) consecutive sides (but no n) belong to one of the facets. The Petrie polygon of a regular polygon is the regular polygon itself; that of a regular polyhedron is a skew polygon such that every two consecutive sides (but no three) belong to one of the faces. For every regular polytope there exists an orthogonal projection onto a plane such that one Petrie polygon becomes a regular polygon with the remainder of the projection interior to it. These polygons and projected graphs are useful in visualizing symmetric structure of the higher dimensional regular polytopes.
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