Acute and Reflex Angles Small 220×320 Medium 439×640 Large 703×1024 Download Tiff Original 1648×2400 | (186.4 KB) Description Illustration showing two positive angles; angle 1 being the acute angle and angle 2 being the reflex angle. Keywords acute angles, angle, geometry, reflex angles Galleries Miscellaneous Angles Source: C. A. Hart & Daniel D. Feldman Plane And Solid Geometry (New York: American Book Company, 1911) 10