🇬🇧 Polygon meaning: English Vocabulary Flash Card

A polygon is a flat shape made from straight line segments that are joined end to end, with no gaps, to make a closed shape. The lines are called sides, and the places where they meet are called corners or vertices. If a shape has three or more straight sides—like a triangle (3 sides), square (4 sides), or pentagon (5 sides)—it is a polygon. Circles and shapes with curved edges are not polygons because their sides are not straight.

I tried to draw a circle, but it came out bumpy and weird, so I just called it a “mystery polygon.”

I tried to impress the teacher by saying, “This isn’t just a doodle, it’s an experimental polygon.”

When the circle tried to join the Polygon Club, the leader said, “Sorry, no curves allowed.”

My math book said a triangle is a polygon, so now my pizza slice feels very educational.

Any flat shape made of three or more straight, connected sides is a polygon, so triangles, squares, and even 100-sided shapes all belong to the giant polygon family.

At the beach, Sam placed sticks into a triangle polygon, then rearranged them into a square polygon, then shaped a friendly polygon with five sides. He ran a finger along each straight side until every polygon closed on the sand. His little cousin cheered, calling each new polygon beautiful, and they high-fived.

This word is at the C2 level, which means it represents the highest mastery of English. It’s often used in specialized or highly formal contexts and helps you communicate with precision and subtlety, much like a native speaker.

Expanding your English vocabulary is one of the best ways to improve your pronunciation, spelling, and confidence in English. Watch the video above to memorize the word, understand its meaning, and see example sentences in action. Discover related words to grow your vocabulary naturally. Add words to your playlist for stress-free, effective learning—anytime, anywhere! Watch, learn, repeat.