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reflex angle

noun, Geometry.
an angle greater than 180° and less than 360°.
Origin of reflex angle
First recorded in 1895-1900 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
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Examples from the Web for reflex angle
Historical Examples
  • It is helpful in trigonometry, and it saves confusion in the case of a reflex angle in a polygon.

    The Teaching of Geometry David Eugene Smith

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