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vertical angles

American  
[vur-ti-kuhl ang-guhlz] / ˈvɜr tɪ kəl ˈæŋ gəlz /

plural noun

  1. Geometry. Also called vertically opposite angles. a pair of angles directly opposite each other, sharing a vertex, and always of equal measure, formed by the intersection of two lines.


vertical angles British  

plural noun

  1. Also called: vertically opposite anglesgeometry the pair of equal angles between a pair of intersecting lines; opposite angles

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

vertical angles Scientific  
/ vûrtĭ-kəl /
  1. Two angles formed by two intersecting lines and lying on opposite sides of the point of intersection.


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