polygon - Master This Word
Master this word with our 5-step learning method – Learn English in English
polygon Word Meanings
- A shape with many sides.
- A closed figure formed by straight lines.
- A geometric figure with at least three sides.
polygon Example Sentences
Example sentences are the start of understanding. Don't rush to memorize. First feel how the word works in a sentence.
polygon Phonetic & Pronunciation
UK
/ˈpɒl.ɪ.ɡən/
US
/ˈpɑː.lɪ.ɡən/
polygon Word Etymology
(a) poly- (many) + gon (angle). (b) From Greek 'polygonon' → Latin 'polygonum' → Old French → English. (c) Imagine a colorful kite with many angles flying high, representing its many-sided nature.
Note 1: These definitions and etymologies are not standard dictionary definitions, but extended explanations provided to help with memorization and understanding of the actual application of words. Through this background information, we strive to make words more vivid and easier to understand, and help you remember their meanings in real life.
Note 2: LexiTalk designs the learning flow around the linguistics principle of “Comprehensible Input.” When learners encounter material that is slightly above their level but still understandable from context, the brain naturally absorbs the language. That’s why we keep every word inside authentic contexts, using examples and associations to help you understand it and use it flexibly.
Read the FAQ explanation of Comprehensible InputReal Context
A polygon is a plane figure with many straight sides that are joined to form a closed shape. Common polygons include triangles, quadrilaterals, pentagons, and hexagons, but there is no upper limit on the number of sides. In geometry, each side meets another at a vertex and the interior angles add up to a total that depends on the number of sides. The term comes from Greek poly meaning many and gon meaning angle. Learners often confuse polygons with curved shapes, forget that the edges are straight, or mix up the number of sides with the number of corners.
Usage Reminders
- Polygon = closed shape with straight sides.
- Don’t confuse with curved shapes like circles.
- Name polygons by their number of sides (triangle, pentagon, etc.).
- Interior angle sum depends on the number of sides.
- Practice by drawing polygons of different sizes to remember properties.
Common Misconceptions
- Polygons must be convex.
- All sides of a polygon are equal.
- A curved shape can be a polygon.
- Any closed figure with straight edges is a polygon.
- A polygon with 2 sides exists.
Thinking Differences
Explain to an English speaker: Polygons are defined by straight sides and a closed shape, but beginners often think any closed figure is a polygon or that all polygons are convex; clarify the straight-edge requirement and the varying angle sums.
Learning Tips
- Draw polygons of different side counts to memorize terms.
- Label each polygon with its number of sides.
- Practice naming: triangle, quadrilateral, pentagon, etc.
- Check interior angle sums with a quick calculation.
- Compare convex vs nonconvex polygons to see differences.
- Use real-world examples like buildings or tiles to spot polygons.
5-Step Learning Method - Learn English in English
Step 1: Meaning
What is the definition of the word 'polygon'?
A.A shape with three or more sides
B.A type of animal
C.A musical instrument
D.A kind of disease
Step 2: Usage
Choose the sentence that uses the word 'polygon' correctly.
A.She drew a polygon with five sides on her paper.
B.The polygon sang beautifully at the concert.
C.The polygon is the fastest animal in the jungle.
D.He cooked a polygon for dinner.
Step 3: Similar Words
Which word is most similar to 'polygon'?
A.Ocean
B.Book
C.Triangle
D.Tree
Step 4: Opposite Words
What is the opposite of 'polygon'?
A.Circle
B.Line
C.Square
D.Rectangle
Step 5: Mastery
Can you think of a real-life example of a shape with multiple sides?
A.A dinner plate is often circle-shaped.
B.A soccer ball is round and smooth.
C.The architect designed a stunning building with various polygon shapes.
D.The flag had a triangular design.
Related Listening
🌱 Lite (Beginner)
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