Definition

A term used to describe a shape, especially a triangle, that has two sides of equal length.

Example

An isosceles triangle has two sides that are the same length and one side that is different.

Conversation

Have you ever seen an isosceles triangle before?

Yeah, I remember learning about them in school!

They're so interesting because two sides are equal, right?

Exactly! It makes them look kind of unique.

Synonyms & Antonyms

Root Explanation

Isosceles is formed from "iso-" (meaning equal) and "skelos" (meaning leg). The word describes a triangle with two equal legs, hence the name isosceles triangle, which has two sides of equal length.

Memory Tip

Think of 'equal' ('iso-') legs in a triangle to remember that an isosceles triangle has two sides that are the same length.

Visually Confused Words