Central Angle

A central angle is an angle whose vertex is the center of a circle, and whose sides pass through a pair of points on the circle, thereby subtending an arc between those two points whose angle is (by definition) equal to the central angle itself. It is also known as the arc segment's angular distance.

Read more about Central Angle:  Coordinates, Calculation of TvL, Occupying Great Circle, Angular Distance Formulary

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