Adjacent Angles Small 320×298 Medium 640×597 Large 1024×954 Download Tiff Original 2400×2237 | (201.3 KB) Description Angles 1 and 2 are adjacent angles. Two angles with a common vertex and a common side between them are adjacent angles. Keywords adjacent angles, angle, geometry Galleries Miscellaneous Angles Source: C. A. Hart & Daniel D. Feldman Plane And Solid Geometry (New York: American Book Company, 1911) 8