Obtuse And Reflex Angles

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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).


G.A. Wentworth Plane And Solid Geometry (Boston: Ginn & Company, 1899) 11


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