Gyroallongée pentagonal Bicoupole

In Geometry, the pentagonal bicoupole gyroallongée is one of the solid of Johnson ( J ₄₆). As the name indicates it, it can be built by gyroallongement of a pentagonal bicoupole ('' J '' ₃₀ or '' J '' ₃₁) while inserting a Antiprisme décagonal between its congruent halves.

The gyroallongée pentagonal bicoupole is one of the five solids of Johnson who are chiral, which means that they have one two forms which are images one of the other in a mirror (or énantiomorphes). In the illustration of right-hand side, each square face of the lower part to half of the figure is connected by a way of two triangular faces to a square face above and on the right. In the chiral figure (the image-mirror of the illustration), each square of the lower part would be connected to a square face under it and on the left. The chiral forms of J ₄₆ are not regarded as different solids of Johnson.

The 92 solid of Johnson were named and described by Norman Johnson in 1966.

External bond

solids of Johnson on the site MathWorld

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