(of a straight-sided plane figure) having two sides equal: an isosceles triangle; an isosceles trapezoid.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
How to use isosceles in a sentence
If the distances between any two of these were the same, the entire set could not be anti-isosceles.
It’s worth noting that many of these sets were rotations or reflections of each other, meaning if one of them was anti-isosceles then others were as well.
Here are examples of the largest non-isosceles sets for the 5×5 grid and the 6×6 grid, which had seven and nine points, respectively.
Friend-of-The-Riddler Dean Ballard explored non-isosceles sets in three-dimensional grids.
That meant there were four equilateral triangles plus 18 isosceles triangles, or 22 triangles in total.
A gaily coloured hat hung from one of the boats, and over each floated a red flag shaped like an isosceles triangle.A Woman's Journey through the Philippines | Florence Kimball Russel
Salvage boat take position at apex isosceles triangle 27.6 degrees with lighthouse and summit hill a mile to the south.Tom Swift and His Giant Telescope | Victor Appleton
A narrow channel running from the Dorsolum to the Abdomen in Coleoptera, forming an isosceles triangle reversed.An Introduction to Entomology: Vol. III (of 4) | William Kirby
So they crept up to the fire in the formation of an isosceles triangle.Denis Dent | Ernest W. Hornung
Then ask them if they are equal-legged (isosceles) triangles.Guide to the Kindergarten and Intermediate Class and Moral Culture of Infancy. | Elizabeth P. Peabody
British Dictionary definitions for isosceles
(of a triangle) having two sides of equal length
(of a trapezium) having the two nonparallel sides of equal length
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
Scientific definitions for isosceles
Of or relating to a geometric figure having at least two sides of equal length.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.