Orthologic
Two Triangles 
and 
are orthologic if the perpendiculars from theVertices 
, 
, 
on the sides 
, 
, and 
pass through one point.This point is known as the orthology center of Triangle 1 with respect to Triangle 2.
- Fine's Equation
- Finite
- Finite Difference
- Finite Field
- Finite Game
- Finite Group
- Finite Group D3
- Finite Group D4
- Finite Group e
- Finite Group Q8
- Finite Group Z2
- Finite Group Z2Z2
- Finite Group Z2Z2Z2
- Finite Group Z2Z4
- Finite Group Z3
- Finite Group Z4
- Finite Group Z5
- Finite Group Z6
- Finite Group Z7
- Finite Group Z8
- Finite Mathematics
- Finite Simple Group
- Finite Simple Group Classification Theorem
- Finite-to-One Factor
- Finsler Geometry