Lengthened pentagonal Gyrobicoupole
In Geometry, the pentagonal gyrobicoupole lengthened is one of the solid of Johnson ( J 39). As the name indicates it, it can be built by lengthening a pentagonal Gyrobicoupole ( J 31) while inserting a prism décagonal between its congruent halves. If one operates a rotation of 36 degrees on one of the pentagonal cupolas ( J 5) before inserting the prism a pentagonal Orthobicoupole lengthened gives ( J 38).
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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