reentering angle

Thân thiện

A student measures a reentering angle on a geometric diagram.

Definition

Noun: * An interior angle of a polygon that is greater than 180 degrees: A reentering angle is a type of interior angle found in concave polygons. It points inward, creating an indentation or "cave" in the shape's outline.

Examples of Usage

• Noun:
  • The star shape has several reentering angles.
  • To identify a concave polygon, look for at least one reentering angle.
  • The architect designed a courtyard with a reentering angle to create a sheltered space.

Advanced Usage

• In geometry and surveying: The term is often used to describe the specific angles in irregular plots of land or complex figures where the boundary line turns back into the property.
  • The survey noted a reentering angle at the northwest corner of the lot.

Variants and Related Words

• Reentrant angle: This is a direct synonym and is used interchangeably with "reentering angle."
• Concave polygon: A polygon that has at least one reentering angle.
• Reflex angle: In a more general sense, any angle greater than 180° but less than 360° is called a reflex angle. A reentering angle is a specific type of reflex angle that is an interior angle of a polygon.

Synonyms

• Reentrant angle
• Reflex interior angle (context-specific)

Antonyms

• Salient angle: An interior angle of a polygon that is less than 180 degrees. This is the more common type found in convex polygons.

Học thuật

Noun

1. an interior angle of a polygon that is greater than 180 degrees

Từ đồng nghĩa

• reentrant angle