decagon - Master This Word
Master this word with our 5-step learning method – Learn English in English
decagon Word Meanings
- A polygon with ten sides.
- A shape used in geometry with ten angles.
- In architecture, a ten-sided figure.
decagon Example Sentences
Example sentences are the start of understanding. Don't rush to memorize. First feel how the word works in a sentence.
decagon Phonetic & Pronunciation
UK
/ˈdɛkəɡən/
US
/ˈdɛkəɡən/
decagon Word Etymology
(Deca- meaning ten + -gon meaning angle) Originating from Greek, then Latin, followed by adaptation in Middle French, before reaching English. Imagine a colorful tent with ten sides, each representing a section of a carnival, helping to remember its ten-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
Decagon is a polygon with ten sides and ten angles. In geometry class it appears when studying basic polygon properties, regularity, and angle sums. The term comes from Greek deka meaning ten and gonia meaning angle, entering English through Latin and medieval French routes. In practical math work, a decagon helps illustrate symmetry and tessellation concepts, and can be drawn with a ten-vertex polygon tool in software or drawn freehand on paper. Regular decagons have equal sides and angles, with interior angles of 144 degrees and exterior angles of 36 degrees. Understanding ten-sided figures aids comparisons with pentagons, hexagons, and other polygons.
Usage Reminders
- Remember the root: deka = ten and gonia = angle.
- Visualize a ten-sided shape by counting vertices.
- Compare decagon with pentagon and hexagon to reinforce differences.
- Practice spelling and pronunciation: decagon.
- Know the interior angle sum: 1440 degrees for a decagon.
- Draw a decagon to fix the concept in memory.
Common Misconceptions
- A decagon is always regular with equal sides and angles.
- A decagon is the same as a polygon with 'many' sides but not specific to ten.
- The sum of interior angles is 360 degrees.
- All decagons must look the same in size and shape.
- Decagon = decahedron (three-dimensional shape).
Thinking Differences
Explain to an English speaker (meta, keep short)
Learning Tips
- Remember the root: deka = ten and gonia = angle.
- Visualize a ten-sided shape by counting vertices.
- Compare decagon with pentagon and hexagon to reinforce differences.
- Practice spelling and pronunciation: decagon.
- Know the interior angle sum: 1440 degrees for a decagon.
- Draw a decagon to fix the concept in memory.
5-Step Learning Method - Learn English in English
Step 1: Meaning
What is the definition of 'decagon'?
A.A polygon with ten angles and ten sides
B.A type of tree found in forests
C.A musical genre popular in the 2000s
D.An athletic competition involving ten events
Step 2: Usage
Which sentence uses 'decagon' correctly?
A.The athlete ran a decagon in the marathon.
B.She baked a decagon-shaped pie for the party.
C.In geometry class, we learned about a decagon that has ten sides.
D.The decagon was the favorite drink at the café.
Step 3: Similar Words
Which word is most similar to 'decagon'?
A.Nonagon
B.Hexagon
C.Polygon
D.Quadrilateral
Step 4: Opposite Words
What is the opposite of 'decagon'?
A.Circle
B.Quadrilateral
C.Triangle
D.Polygon
Step 5: Mastery
Can you think of a real-life context where a 'decagon' would be relevant?
A.The floor of the art gallery was laid out in a beautiful geometric pattern, featuring a decagon.
B.Some playgrounds have equipment shaped like octagons.
C.Many buildings are designed with a circular base.
D.In cooking, it's common to use circular pans for baking.
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