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Glite Dictionary
reentrant angle

reentrant angle

9.9
An inside corner of a shape that bends inward past a straight line
  • noun
  • /rɪˈɛntrənt ˈæŋɡəl/
  • Specialized
translation icon : ángulo reentrante
  • When drawing the floor plan, the architect identified a reentrant angle in the alcove corner.

Examples

  • The concave polygon had a single reentrant angle that pointed inward.

  • A reentrant angle can create unique architectural designs.

  • A star-shaped figure is characterized by its multiple reentrant angles at the narrow points.

  • The polygon featured a reentrant angle that made it look unusual.

  • The complex design of the star-shaped building included several reentrant angles that created unique interior spaces.

  • In geometry class, we learned that a polygon with a reentrant angle must have at least one angle greater than 180 degrees.

  • Architects often use reentrant angles in their designs to make structures more visually interesting and functional.

Synonyms

reentering angle
vsreentrant angle
  • Specialized
9.6

An inside corner of a shape that points inward more than a straight line

is the same in meaning but appears as a different written form
reflex angle
vsreentrant angle
  • Specialized
5.8

An angle larger than 180 degrees but smaller than 360 degrees

is specifically an interior polygon angle that turns the shape inward
reentrance
vsreentrant angle
  • Specialized
9.1

An inward curve in a shape or building that makes a small hollow

refers to an interior polygon angle defined by measure rather than a recess

Antonyms

convex
  • Specialized
1 5.8

A surface that curves outward like the outside of a ball

salient angle
  • Specialized
8.6

An angle inside a shape that sticks out and is less than 180 degrees

How Large

reentrant angle
  • Specialized
9.9
obtuse angle
  • Specialized
1 3.4
right angle
  • Specialized
16 2.4
acute angle
  • Specialized
1 2.8

Surface Forms

reentrant angle singular
reentrant angles plural

Morphology

reentrant + angle

The noun 'angle' is transparent but 'reentrant' is a rare, technical adjective; while its form (re- + entrant) can hint at 'turning back' or 'inward', the precise geometric sense of an interior angle greater than 180° is specialized and not fully predictable from the parts for a B1 learner. Therefore the compound is partially compositional—learners may infer a general inward-turning sense but would need technical exposure to grasp the exact meaning.

Etymology

Reentrant angle comes from the idea of a corner that 're-enters' the shape: re- means 'back' and entrant means 'entering', so the corner turns inward. That's why it describes an inside corner that points into the shape and is more than 180 degrees.