Self-Dual Enneahedron #2 (canonical)

11 total:

2

2 have C4v symmetry:

1

This is the only one with 3 edge lengths

(box: x-ray) (F: faces) (slider: perspective) (image: L=rotate R=zoom) (M: metrics)

Self-Dual Enneahedron #2 (canonical)

Vertices:	9 (4[3] + 1[4] + 4[4])
Faces:	9 (4 isosceles triangles + 1 square + 4 kites)
Edges:	16 (8 short + 4 medium + 4 long)
Symmetry:	4-fold Pyramidal (C4v)
(values below based on edge-scribed radius = 1)
Short Edge (8):	2(3sqrt(2)−sqrt(6))/3	≈1.1954339628907380321
Medium Edge (4):	2*sqrt(6)/3	≈1.63299316185545206546
Long Edge (4):	3*sqrt(2)−sqrt(6)	≈1.7931509443361070482
Edge-scribed Radius:	1
Volume:	16(5sqrt(3)−3)/27	≈3.35422461501889568453