exterior angle
- an angle formed outside parallel lines by a third line that intersects them.
- an angle formed outside a polygon by one side and an extension of an adjacent side; the supplement of an interior angle of the polygon.
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Origin of exterior angle
First recorded in 1885–90
Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
exterior angle
- an angle of a polygon contained between one side extended and the adjacent side
- any of the four angles made by a transversal that are outside the region between the two intersected lines
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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
exterior angle
[ĭk-stîr′ē-ər]
- The angle formed between a side of a polygon and an extended adjacent side. Compare interior angle.
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The American Heritage® Science Dictionary
Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.