exterior angle
Americannoun
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an angle formed outside parallel lines by a third line that intersects them.
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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.
noun
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an angle of a polygon contained between one side extended and the adjacent side
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any of the four angles made by a transversal that are outside the region between the two intersected lines
Etymology
Origin of exterior angle
First recorded in 1885–90
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
ABC is an exterior angle or angle of the polygon.
From Encyclopaedia Britannica, 11th Edition, Volume 10, Slice 6 "Foraminifera" to "Fox, Edward" by Various
The narrow entrance is at the exterior angle of the L, between the water-battery and the lighthouse; and in the interior angle are the Castelli, Konak, &c.
From The Atlantic Monthly, Volume 20, No. 121, November, 1867 by Various
Ar�ris, in architecture, the line in which the two straight or curved surfaces of a body, forming an exterior angle, meet each other.
From The New Gresham Encyclopedia. Vol. 1 Part 2 Amiel to Atrauli by Various
It is said that he discovered the proposition relating to the exterior angle of a triangle.
From The Teaching of Geometry by Smith, David Eugene
The angle formed by B, E is called an exterior angle; and that formed by E, F is an interior angle.
From Carpentry for Boys In a Simple Language, Including Chapters on Drawing, Laying Out Work, Designing and Architecture With 250 Original Illustrations by Zerbe, James Slough
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
