xiên góc

xiên góc

Một học sinh vẽ một đường xiên góc trên bảng đen.

Definition
  1. Adjective:
    • Oblique: Describing a line, plane, or direction that is slanted or at an angle that is not a right angle (90 degrees) to a given reference line or surface. It is the primary mathematical and geometric term for "xiên góc".
Usage Examples
  • Adjective:
    • Đường thẳng này cắt nhau tạo thành một góc xiên. (This straight line intersects to form an oblique angle.)
    • Trong hình học, một đường xiên góc không vuông góc với mặt phẳng. (In geometry, an oblique line is not perpendicular to the plane.)
Advanced Usage
  • "góc xiên": This is a common variant phrase meaning "oblique angle".
    • Tam giác này có một góc xiên. (This triangle has an oblique angle.)
Variants and Related Words

  • Xiên (adj): slanting, skew. This is the root word implying a slanted direction.

    • Cây cọc được đóng xiên xuống đất. (The stake was driven slantingly into the ground.)

  • Góc nhọn (n): acute angle.

  • Góc tù (n): obtuse angle.
  • Góc vuông (n): right angle.
Synonyms
  • Slanted: positioned at an angle.
  • Skew: neither parallel nor intersecting at a right angle (often used for lines in three dimensions).
  • Diagonal: extending from one corner to another, often implying an oblique line within a shape.
Related Terms and Concepts

  • Đường xiên: oblique line. A line that intersects another line or plane at an angle that is not 90 degrees.

    • Từ điểm A, kẻ một đường xiên đến đường thẳng BC. (From point A, draw an oblique line to line BC.)

  • Hình chiếu xiên: oblique projection. A type of technical drawing projection where the projectors are parallel but strike the plane at an oblique angle.