đường thẳng

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The Vietnamese word "đường thẳng" translates to "straight line" in English. It is a term commonly used in mathematics and geometry to describe a line that does not curve or bend; it goes in one direction without changing.

Usage Instructions:

1. Basic Definition: Use "đường thẳng" when discussing shapes, geometry, or any context where you want to convey the idea of a line that is straight.
2. Context: It can be used in both casual conversation and academic discussions, particularly in subjects related to math or art.

Example:

• Basic Example: "Một đường thẳng nối hai điểm." (A straight line connects two points.)

Advanced Usage:

• In geometry, "đường thẳng" can be used to explain concepts like parallel lines (các đường thẳng song song) or intersecting lines (các đường thẳng cắt nhau).
• In art, you might use "đường thẳng" to describe the lines in a drawing or painting that are meant to be straight, contributing to the overall composition.

Word Variants:

• Đường cong: This means "curved line," which is the opposite of "đường thẳng."
• Đường: This can mean "line" or "road," and is a root word for "đường thẳng."

Different Meanings:

While "đường thẳng" primarily refers to a straight line in geometry, in a broader sense, it can also imply clarity or directness in communication or actions, such as being straightforward (nói thẳng).

Synonyms:

• Đường thẳng does not have direct synonyms in the context of geometry, but you can refer to "đường" (line) when the context is clear.
• In a broader sense, you might encounter phrases like "đường chính" which refers to a main or primary line, but these are not direct synonyms.

Academic

1. Straight line