Definition

A flat shape with three straight sides and three angles, or a relationship involving three people.

Example

The architect designed a building with a triangular roof.

Conversation

I just finished drawing a triangle for my art project.

Oh nice! Is it for the geometry section?

Yeah, I wanted to make it look really sharp and perfect.

That sounds cool! Triangles can be really fun to work with.

Synonyms & Antonyms

Root Explanation

Triangle → It is formed from "tri-" (meaning three) and "angulus" (meaning angle). The word "triangle" refers to a shape that has three angles.

Memory Tip

Think of 'three' ('tri-') angles coming together to form a shape — that's what a triangle is.

Visually Confused Words