Supplementary and Right Angles Small 320×190 Medium 640×381 Large 1024×609 Download Tiff Original 2400×1428 | (200.7 KB) Description Illustration showing angles 1 and 2 are supplementary and angles ACD and DCB are supplementary. Also, Angles ACD and DCB are right angles. Keywords acute angles, Adjacent, angle, geometry, perpendicular, right angles, supplementary Galleries Miscellaneous Angles Source: C. A. Hart & Daniel D. Feldman Plane And Solid Geometry (New York: American Book Company, 1911) 14
