Definition

A tool used to measure and draw angles, typically shaped like a half-circle with markings for degrees.

Example

In math class, we used a protractor to measure the angles of the triangles.

Conversation

Do you remember where I put my protractor?

I think I saw it on your desk last time.

I really need it for my math homework tonight.

You should check there; it’s usually where you keep your tools.

Synonyms & Antonyms

Root Explanation

Protractor → It is formed from "pro-" (meaning forward) and "tractus" (from "tractare", meaning to draw or pull). The word refers to a tool that helps in drawing angles forward on a surface.

Memory Tip

Think of 'drawing forward' with the protractor, as 'pro-' means forward and 'tractus' relates to drawing.

Visually Confused Words