Positive and Negative Arcs in Circles Small 284×320 Medium 567×640 Large 908×1024 Download Tiff Original 2128×2400 | (196.8 KB) Description Illustration showing arcs measured in positive and negative angles. Keywords angle, angles, arc, arcs, circle, circles, negative, positive Galleries Circles Source: G.A. Wentworth Plane And Solid Geometry (Boston: Ginn & Company, 1899) 106
