Radius of a Circle Small 320×296 Medium 640×591 Large 1024×946 Download Tiff Original 2400×2218 | (185.1 KB) Description Illustration of a circle with radius QR. Keywords circle, circles, geometry, radii, radius Galleries Circles Source: C.A. Hart, Daniel D. Feldman Plane and Solid Geometry (New York, NY: American Book Company, 1911)
