parallelogram - Master This Word
Master this word with our 5-step learning method – Learn English in English
parallelogram Word Meanings
- A four-sided shape with opposite sides that are equal in length.
- A figure formed by two pairs of parallel lines.
- A geometric shape with equal opposite angles.
parallelogram Example Sentences
Example sentences are the start of understanding. Don't rush to memorize. First feel how the word works in a sentence.
parallelogram Phonetic & Pronunciation
UK
/pəˌræləˈlɒɡræm/
US
/ˌpærəˈlɛləˌɡræm/
parallelogram Word Etymology
Root decomposition: 'parallel' (sides that never meet) + 'gram' (a drawing). Historical origin: Greek 'parallelos' → Latin 'parallelogrammus' → Old French → English. Memory image: Image a pair of railroad tracks stretching endlessly into the horizon, never meeting, with a rectangular plot of land between them representing the parallelogram.
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
Parallelogram is a four‑sided polygon where opposite sides are parallel and equal in length. A common way to visualize it is as a rectangle that has been slanted, so two pairs of parallel lines form the sides. Opposite angles are equal, and adjacent angles are supplementary. You can obtain a parallelogram by translating one side along the direction of its length. The area is base times height, where the height is the perpendicular distance between the bases. Special cases include rectangles (angles are right) and rhombuses (all sides equal). The concept appears in many geometric problems and in vector geometry.
Usage Reminders
- Remember: opposite sides are parallel and equal in length.
- A parallelogram can be formed by translating one side along its length.
- Opposite angles are equal; adjacent angles sum to 180 degrees.
- Area = base × height, not base × side.
- Rectangles and rhombuses are special parallelograms.
Common Misconceptions
- A parallelogram must be a rectangle.
- All four sides are always equal.
- Diagonals are always perpendicular.
- The height equals the side length.
- If one angle is acute, all angles are acute.
Thinking Differences
English learners often focus on the word 'parallelogram' as a single concept, but in English we emphasize the properties (parallel and equal opposite sides) and the area formula separately; learners may conflate with rectangles or rhombuses.
Learning Tips
- Draw and label a parallelogram on paper or a grid.
- Practice identifying opposite sides as parallel and equal.
- Use coordinates to verify area as base × height.
- Compare with rectangle and rhombus to see differences.
- Check diagonals to understand special cases.
- Solve quick problems with different base-heights.
5-Step Learning Method - Learn English in English
Step 1: Meaning
What is the definition of 'parallelogram'?
A.A scientific term for energy transfer.
B.A type of fruit.
C.A four-sided figure with opposite sides that are equal and parallel.
D.A synonym for triangle.
Step 2: Usage
Which sentence correctly uses the word 'parallelogram'?
A.In geometry, a parallelogram has two pairs of equal sides and parallel opposite sides.
B.The recipe calls for a parallelogram of flour.
C.The artist painted a parallelogram on the canvas.
D.She enjoyed reading about the parallelogram of the latest novel.
Step 3: Similar Words
Which word is a synonym for 'parallelogram'?
A.Circle
B.Rectangle
C.Sphere
D.Triangle
Step 4: Opposite Words
What is an opposite word to 'parallelogram'?
A.Square
B.Circle
C.Triangle
D.Polygon
Step 5: Mastery
Can you think of a real-life context where you might encounter a parallelogram?
A.When measuring the area of a rectangular garden.
B.During a math class when learning about shapes.
C.While painting a round mural.
D.When cutting a pizza into equal slices.
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