Girard's Spherical Excess Formula
Let a Spherical Triangle 
have angles 
, 
, and 
. Then the Spherical Excess isgiven by
See also Angular Defect, L'Huilier's Theorem, Spherical Excess
References
Coxeter, H. S. M. Introduction to Geometry, 2nd ed. New York: Wiley, pp. 94-95, 1969.
- Christoffel Symbol of the First Kind
- Christoffel Symbol of the Second Kind
- Chromatic Number
- Chromatic Polynomial
- Chu Identity
- Church's Theorem
- Church's Thesis
- Church-Turing Thesis
- Chu Space
- Chu-Vandermonde Identity
- Chvátal's Art Gallery Theorem
- Chvátal's Theorem
- ci
- Ci
- Cigarettes
- Cin
- Circle
- Circle Caustic
- Circle-Circle Intersection
- Circle Cutting
- Circle Evolute
- Circle Inscribing
- Circle Involute
- Circle Involute Pedal Curve
- Circle Lattice Points