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Mathematics · Grades 3–4

Polygon

noun

A flat, closed shape with three or more straight sides.

Example Sentences

"A triangle is a polygon with three sides."

"Hexagons, pentagons, and octagons are all different types of polygons."

Synonyms & Related Terms

shapefigure

Quick Check

Which best describes the meaning of polygon?

Study Tips

To remember polygon, try writing it in a sentence of your own. Connect it to something you already know about mathematics.

Use it in conversation today — saying a word aloud three times helps lock it into long-term memory.