# vertical angle

- one of two opposite and equal angles formed by the intersection of two lines.

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## Origin of vertical angle^{}

First recorded in 1565–75

Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

## vertical angles

- geometry the pair of equal angles between a pair of intersecting lines; opposite anglesAlso called: vertically opposite angles

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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

[vûr′tĭ-kəl]

- Two angles formed by two intersecting lines and lying on opposite sides of the point of intersection.

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The American Heritage® Science Dictionary
Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.