The Pentagonal Bipyramid

The pentagonal bipyramid is the 13th Johnson solid (J13). It has 7 vertices 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.

Last updated 09 Apr 2018.

Powered by Apache Runs on Debian GNU/Linux Viewable on any browser Valid CSS Valid HTML 5! Proud to be Microsoft-free