Bottomless tetrahedron
Geometric and other shapes | Kunihiko Kasahara |  Origami Omnibus by Kunihiko Kasahara (read full review)
| 202 | Square | |
Skeleton of a regular tetrahedron
Geometric and other shapes | Kunihiko Kasahara | Origami Omnibus by Kunihiko Kasahara (read full review)
| 78 | Rectangle
6 units | |
Stellate tetrahedron
Geometric and other shapes | Kunihiko Kasahara | Origami Omnibus by Kunihiko Kasahara (read full review)
| 244 | Rectangle | |
Tetrahedron
Geometric and other shapes | Kazuo Haga |  Origami for the Connoisseur by Kunihiko Kasahara and Toshie Takahama (read full review)
| 56 | Square | 
Folded by Ondrej and Radim Cibulka |
Tetrahedron
Geometric and other shapes | Kunihiko Kasahara |  Amazing Origami by Kunihiko Kasahara
| 59 | Square
6 units | |
Tetrahedron
Geometric and other shapes | Kunihiko Kasahara |  Folding from Copy Paper by Kunihiko Kasahara
| 73 | Rectangle | |
Tetrahedron
Geometric and other shapes | Kunihiko Kasahara |  The Art and Wonder of Origami by Kunihiko Kasahara
| 86 | Square | |
Tetrahedron - rotating
Geometric and other shapes | Tomoko Fuse | Origami for the Connoisseur by Kunihiko Kasahara and Toshie Takahama (read full review)
| 16 | Square
3 units
A flexagon | |
Tetrahedron clip
Geometric and other shapes | Juan Gimeno |  As the Memories in Spain by Kunihiko Kasahara | 14 | Rectangle
2 units
From a Metro card | |
