Pivot Theorem
If the Vertices 
, 
, and 
of Triangle 
lie on sides 
, 
, and 
of the Triangle 
, then the three Circles 
, 
, and 
have a common point. Inextended form, it is Miquel's Theorem.
References
Coxeter, H. S. M. and Greitzer, S. L. Geometry Revisited. New York: Random House, pp. 61-62, 1967. Forder, H. G. Geometry. London: Hutchinson, p. 17, 1960.
- Hamming Function
- Ham Sandwich Theorem
- Handedness
- Handkerchief Surface
- Handle
- Handlebody
- Hankel Function
- Hankel Function of the First Kind
- Hankel Function of the Second Kind
- Hankel Matrix
- Hankel's Integral
- Hankel Transform
- Hann Function
- Hanning Function
- Hanoi Graph
- Hanoi Towers
- Hansen-Bessel Formula
- Hansen Chain
- Hansen Number
- Hansen's Problem
- Happy Number
- Harada-Norton Group
- Harary Graph
- Hard Hexagon Entropy Constant
- Hard Square Entropy Constant