Obtuse And Reflex Angles
An illustration showing an angle the is greater than a right angle and less than a straight angle. This is an obtuse angle (solid curved arrow). The angle that is greater than a straight angle and less than two straight angles is called a reflex angle (dashed curved arrow).
Keywordsgeometry, reflex, angle, angles, obtuse, not right angle, greater than 90 degrees, less than, greater than 180 degrees
G.A. Wentworth Plane And Solid Geometry (Boston: Ginn & Company, 1899) 11