Central Angle in a Circle Small 275×320 Medium 551×640 Large 881×1024 Download Tiff Original 2065×2400 | (204.5 KB) Description Illustration of a circle with central angle AOB. Keywords angles, central angle, circle, circles, geometry Galleries Circles Source: C.A. Hart, Daniel D. Feldman Plane and Solid Geometry (New York, NY: American Book Company, 1911)