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