This document presents a mathematical analysis of regular spherical polygons. It derives a characteristic equation relating the radius of the sphere, length of each side, interior angle, and number of sides. This equation can be used to calculate any parameter when the other three are known. The document also discusses calculating the solid angle, area, and other properties of both regular spherical polygons and their corresponding planar polygons. It provides examples of applying the analysis to polygons on both general spheres and the unit sphere.