Area-Preserving Map
A Map 
from 
to is Area-preserving if
for every subregion
of , where 
is the 
-D Measure of . A linear transformation isArea-preserving if its corresponding Determinant is equal to 1.See also Conformal Map, Symplectic Map- Triacontagon
- Triacontahedron
- Triad
- Triakis Icosahedron
- Triakis Octahedron
- Triakis Tetrahedron
- Trial
- Trial Division
- Trial Divisor
- Triamond
- Triangle
- Triangle Arcs
- Triangle Center
- Triangle Center Function
- Triangle Coefficient
- Triangle Condition
- Triangle Counting
- Triangle Function
- Triangle Inequality
- Triangle Inscribing in a Circle
- Triangle Inscribing in an Ellipse
- Triangle of Figurate Numbers
- Triangle Postulate
- Triangle Squaring
- Triangle Tiling