Meaning & use
isosceles
Describing a triangle that has exactly two sides of equal length and two equal angles.
See it in a sentence
The students measured the isosceles triangle to confirm that two of its sides matched.
An isosceles roof truss balances evenly because both slanted sides are the same length.
A note on using this word
An isosceles triangle differs from an equilateral triangle, which has all three sides equal, and a scalene triangle, which has none equal.
Words with a similar meaning
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