PolygonAngle

PolygonAngle[poly]

gives a list of angles at the vertex points of poly.

PolygonAngle[poly,p]

gives the angle at the vertex point p of a polygon poly.

PolygonAngle[poly,i]

gives the angle at the point pi of poly in canonical form Polygon[{p1,,pn},data].

PolygonAngle[,"spec"]

gives the angle specified by "spec".

Details

  • PolygonAngle is also known as interior angle.
  • PolygonAngle[poly, p] gives the angle delimited by the two adjacent sides intersecting at p.
  • The following specifications "spec" can be given:
  • "Interior"interior (inside) angle at p
    "Exterior"exterior angle at p
    "FullExterior"full exterior angle at p
  • PolygonAngle[poly,p,"Interior"] is equivalent to PolygonAngle[poly,p].
  • PolygonAngle[poly,p,"Exterior"] is equivalent to π-PolygonAngle[poly,p].
  • PolygonAngle[poly,p,"FullExterior"] is equivalent to 2π-PolygonAngle[poly,p].
  • PolygonAngle can be used with symbolic polygons in GeometricScene.

Examples

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Basic Examples  (2)

The list of angles at the vertex points:

The angle at the vertex point {-2,0}:

The angle at the point 1 of in canonical form:

Scope  (6)

Basic Uses  (3)

Use PolygonAngle to find the list of angles at the vertex points:

The angle at the vertex point:

PolygonAngle works on polygons:

Parallelogram:

RegularPolygon:

PolygonAngle works on polygons with GeoGridPosition:

Specifications  (3)

"Interior"  (1)

The interior angle of a polygon at the vertex points:

"Exterior"  (1)

The exterior angle of a polygon at the vertex points:

"FullExterior"  (1)

The full exterior angle of a polygon at the vertex points:

Properties & Relations  (2)

The sum of interior angles of a regular polygon is :

PolygonAngle[, p] is equivalent to PlanarAngle[p->{q1,q2}] where q1 and q2 are adjacent points of p in a polygon :

Introduced in 2019
 (12.0)