Tag Archives: heptagon

Four Polyhedra Featuring Heptagons

Heptagons only appear infrequently in interesting polyhedra. I recently found a few that I like. To form the first of these solids, shown above, I started with the icosidodecahedron, dropped the symmetry of the model from icosahedral to tetrahedral, and … Continue reading

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A Tetrahedrally-Symmetric Polyhedron Featuring Heptagons

Created using Stella 4d: Polyhedron  Navigator; see this website to try it for yourself!

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Three Polyhedra Featuring Heptagons

For some reason I do not fully understand, polyhedra featuring heptagons, even if irregular, do not appear often, at least not in my geometrical investigations — so I was pleased to find these three, using Stella 4d: Polyhedron Navigator, available … Continue reading

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A Box of Heptagons

It is hard to find polyhedra which contain regular heptagons, but that simply makes the search more challenging, and therefore more fun. This polyhedron features six regular heptagons, and was created with Stella 4d, software available here.

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A Star with 49 Points, to Celebrate the 49-Hour Weekend Caused by the End of Daylight Saving Time, Tomorrow, in Most of the USA

This is the weekend that Daylight Saving Time (or DST) ends in most parts of the USA, which means that this is the only weekend of the year, here, which lasts 49 hours, rather than the usual 48. To celebrate … Continue reading

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Heptamandala

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A Survey of Right Angles in Convex Heptagons

In how many ways can different numbers of right angles appear in convex heptagons? Heptagons do not have to have right angles at all, of course. If a heptagon has exactly one right angle, only one arrangement is possible:  a … Continue reading

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