The Gyroelongated Square Pyramid

The gyroelongated square pyramid is the 10th Johnson solid (J10). It has 9 vertices, 20 edges, and 13 faces (12 equilateral triangles and 1 square)

The gyroelongated square

The gyroelongated square pyramid can be constructed by attaching a square pyramid to a square antiprism.

Attaching a second square pyramid to the other side of the antiprism produces the gyroelongated square bipyramid (J17).


Here are some views of the gyroelongated square pyramid from various angles:

Projection Envelope Description
Regular octagon

Top view.


Side view.


Diagonal side view.


22.5° side view.


The Cartesian coordinates of the gyroelongated square pyramid with edge length 2 are:

Last updated 18 Jun 2019.

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