Acute Angle Small 320×167 Medium 640×334 Large 1024×534 Download Tiff Original 2400×1251 | (163.6 KB) Description An illustration showing an angle the is less than a right angle. This is an acute angle. Keywords acute, angle, angles, geometry, less than 90 degrees, not right angle Galleries Acute Angles Source: G.A. Wentworth Plane And Solid Geometry (Boston: Ginn & Company, 1899) 11
