Elongated Triangular Dipyramid
 |
Johnson Solid 
.
- Tetrahedral Coordinates
- Tetrahedral Graph
- Tetrahedral Group
- Tetrahedral Number
- Tetrahedral Surface
- Tetrahedroid
- Tetrahedron
- Tetrahedron 10-Compound
- Tetrahedron 5-Compound
- Tetrahedron Inscribing
- Tetrahemihexacron
- Tetrahemihexahedron
- Tetrakaidecagon
- Tetrakaidecahedron
- Tetrakis Hexahedron
- Tetranacci Number
- Tetrix
- Tetromino
- Thales' Theorem
- Theorem
- Theorema Egregium
- Theta Function
- Theta Operator
- Theta Subgroup
- Thiele's Interpolation Formula