góc lồi
Definition
- Noun:
- Convex angle: An angle that measures less than 180 degrees. It is the interior angle of a convex polygon, where the entire angle points "outward" and the region inside the angle does not contain a reflex portion.
Usage Examples
- Noun:
- Một hình vuông có bốn góc lồi. (A square has four convex angles.)
- Góc lồi luôn nhỏ hơn 180 độ. (A convex angle is always less than 180 degrees.)
- Trong tam giác, tất cả các góc đều là góc lồi. (In a triangle, all angles are convex angles.)
Advanced Usage
- In geometry, a convex polygon is defined as a polygon where all interior angles are convex angles.
- Một đa giác đều luôn là đa giác lồi với các góc lồi. (A regular polygon is always a convex polygon with convex angles.)
Variants and Related Words
Góc lõm (n): Concave angle; an angle that measures more than 180 degrees but less than 360 degrees.
- Một ngôi sao năm cánh có cả góc lồi và góc lõm. (A five-pointed star has both convex and concave angles.)
Đa giác lồi (n): Convex polygon; a polygon where all interior angles are convex angles and all vertices point outward.
Synonyms
- Acute angle: An angle less than 90 degrees (a specific type of convex angle).
- Obtuse angle: An angle between 90 and 180 degrees (a specific type of convex angle).
- Interior angle (of a convex polygon): The angle inside a convex polygon at a vertex.
Related Concepts
- Reflex angle: The larger angle (greater than 180°) associated with a convex angle at a point; the two angles sum to 360 degrees.
- Convex set: A set of points where, for any two points in the set, the entire line segment connecting them is also within the set. A convex angle is a simple example of a convex set.