Inscribed Angle in a Circle Proof

Description

Illustration of a circle with an inscribed angle that can be used to prove that "An inscribed angle is measured by one half of its intercepted arc." In this case, center O lies outside angle ABC.

Keywords

angles, circle, circles, geometry, inscribed angle

Galleries

Geometric Theorems and Proofs

Source:

C.A. Hart, Daniel D. Feldman Plane and Solid Geometry (New York, NY: American Book Company, 1911)

Courtesy the private collection of Roy Winkelman