reentering angle
- noun
- Specialized
:
ángulo reentrante
- In a polygon, a reentering angle measures more than 180 degrees.
Examples
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The architect had to account for the reentering angle at the corner of the building when designing the façade.
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A star-shaped polygon often has at least one reentering angle in its structure.
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Polygons with a reentering angle appear in advanced geometry problems.
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A reentering angle can create interesting shapes in design.
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A star-shaped polygon often has at least one reentering angle that gives it a unique shape.
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The architect had to account for the reentering angle when creating the modern design of the building.
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In geometry, a polygon with a reentering angle is considered non-convex due to its inward-pointing angles.
Synonyms
An inside corner of a shape that bends inward past a straight line
An angle larger than 180 degrees but smaller than 360 degrees
How Large
- Specialized
- Specialized
- Specialized
1
3.4
- Specialized
16
2.4
- Specialized
1
2.8
Surface Forms
Morphology
reentering + angle
While 'angle' is a simple, transparent constituent, 'reentering' (from re-enter) suggests 'entering again' rather than clearly indicating an interior/reflex angle greater than 180°. The geometric sense (>180°) is technical and not directly predictable from the everyday meanings of the parts, though the form is somewhat suggestive (inward/re-entering) and has cognates in other languages, so learners might get a partial clue.
Etymology
The noun reentering angle comes from the picture of a corner that bends back into a shape: reentering suggests the corner goes back inside and the angle points inward rather than out. So it names an interior corner 'greater than 180 degrees'.