góc phẳng

Một học sinh dùng thước đo góc để đo một góc phẳng trên tờ giấy.

Definition

Noun:
- Plane angle: The most common and fundamental meaning of "góc phẳng" is a geometric figure formed by two rays (the sides of the angle) sharing a common endpoint (the vertex), lying in a single plane.
- Angle in a plane: It specifies an angle that is measured within a two-dimensional flat surface, as opposed to a solid or dihedral angle.
Noun (technical):
- Angle of a dihedral section: In advanced geometry, "góc phẳng" can refer to the angle formed by the intersection of a dihedral angle with a plane that is perpendicular to the edge of the dihedral.

Usage Examples

Noun:
- Một tam giác có ba góc phẳng. (A triangle has three plane angles.)
- Hãy đo góc phẳng tạo bởi hai đường thẳng này. (Please measure the plane angle formed by these two lines.)
- Góc phẳng được đo bằng độ hoặc radian. (A plane angle is measured in degrees or radians.)

Advanced Usage

In technical drawings and engineering, "góc phẳng" is crucial for specifying precise measurements on a flat blueprint or diagram.
- Bản vẽ yêu cầu xác định chính xác tất cả các góc phẳng. (The drawing requires the precise determination of all plane angles.)

Variants and Related Words

Góc (n): angle. This is the general term.
- Góc vuông là một loại góc phẳng đặc biệt. (A right angle is a special type of plane angle.)
Góc nhị diện (n): dihedral angle. This is the three-dimensional counterpart to a plane angle.
- Góc phẳng của một hình chiếu có thể khác với góc nhị diện thực. (The plane angle of a projection can differ from the actual dihedral angle.)

Synonyms

Angle: the general term for the figure formed by two lines meeting at a point.
Flat angle: emphasizes the two-dimensional, planar nature.

Related Terms