Central Angles and Arcs in a Circle

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Illustration of a circle that can be used to show that an “angle at the center of a circle is measured by its intercepted arc.” Angle AOB and angle COE are commensurable.

Galleries

Circles

Source

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

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2400×2281, 316.0 KiB

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1024×973, 49.1 KiB

Medium GIF

640×608, 26.7 KiB

Small GIF

320×304, 10.7 KiB