# isosceles

[ahy-sos-uh-leez] /aɪˈsɒs əˌliz/
1.
(of a straight-sided plane figure) having two sides equal:
an isosceles triangle; an isosceles trapezoid.
Origin of isosceles
1545-1555
1545-55; < Late Latin < Greek isoskelḗs with equal legs, equivalent to iso- iso- + skél(os) leg + -ēs adj. suffix
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2016.
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Examples from the Web for isosceles
Historical Examples
• If they were arranged as here shown, the proposition would be evident for the special case of an isosceles right triangle.

David Eugene Smith
• And equilaterals, and isosceles triangles, and all that, scoffed Neale.

Grace Brooks Hill
• We therefore say that an isosceles triangle has two sides equal, leaving it possible that all three sides should be equal.

David Eugene Smith
• So they crept up to the fire in the formation of an isosceles triangle.

Ernest W. Hornung
• Right things do come in so terribly askew, like good old Mr. isosceles, sidling up the broad aisle of a Sunday!

Mrs. A. D. T. Whitney
• Then ask them if they are equal-legged (isosceles) triangles.

Elizabeth P. Peabody
• But it was manifest that all, except the isosceles, were moved by his words and were either neutral or averse to the Bill.

Edwin Abbott Abbott
• A similar idea, employing an isosceles linkage, was patented in 1803 by William Freemantle, an English watchmaker (fig. 14).

Eugene S. Ferguson
• The rubber is molded in long strips in some form of isosceles triangle, depending on the style of the game to be played.

Various
• The angles at the base of the isosceles triangles are apt to get mixed, and to confuse us all--man and woman alike.

Charles Dudley Warner
British Dictionary definitions for isosceles

## isosceles

/aɪˈsɒsɪˌliːz/
1.
(of a triangle) having two sides of equal length
2.
(of a trapezium) having the two nonparallel sides of equal length
Word Origin
C16: from Late Latin, from Greek isoskelēs, from iso- + skelos leg
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for isosceles

"having two equal sides," 1550s, from Late Latin isosceles, from Greek isoskeles "with equal sides," from isos "equal" (see iso-) + skelos "leg" (see scalene).

Online Etymology Dictionary, © 2010 Douglas Harper
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isosceles in Science
 isosceles   (ī-sŏs'ə-lēz')    Of or relating to a geometric figure having at least two sides of equal length.
The American Heritage® Science Dictionary
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### Word Value for isosceles

0
13
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