The Pentagonal Bipyramid

The pentagonal bipyramid is the 13th Johnson solid (J13). It has 7 vertices, 15 edges, and 10 faces (10 equilateral triangles).

The pentagonal bipyramid

The pentagonal bipyramid can be constructed by attaching two pentagonal pyramids to each other at their bases.


Here are some views of the pentagonal bipyramid from various angles:

Projection Envelope Description
Regular pentagon

Top view.


Side view.


Front view.


The Cartesian coordinates of the pentagonal bipyramid with edge length 2 are:

where φ=(1+√5)/2 is the Golden Ratio.


The pentagonal bipyramid occurs as cells in some CRF polychora, including (but not limited to):

Last updated 18 Jun 2019.

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