A closed geometric figure on the surface of a Sphere which is formed by the Arcs of Great Circles. The spherical polygon is a generalization of the Spherical Triangle. If is the
sum of the Radian Angles of a spherical polygon on a Sphere of Radius ,
then the Area is
See also Great Circle, Spherical Triangle
References
Beyer, W. H. CRC Standard Mathematical Tables, 28th ed. Boca Raton, FL: CRC Press, p. 131, 1987.