Vertex Angle -- From Wolfram MathWorld

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Vertex Angle VertexAngle

The point about which an angle is measured is called the angle's vertex, and the angle theta associated with a given vertex is called the vertex angle.

In a polygon, the (interior, i.e., measured on the interior side of the vertex) are generally denoted alpha_i or A_i. The sum of interior angles in any n-gon is given by (n-2)pi radians, or 2(n-2)×90 degrees (Zwillinger 1995, p. 270).

See also

Angle, Central Angle, Dihedral Angle, Exterior Angle, Line-Line Angle, Regular Polygon

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References

Zwillinger, D. (Ed.). CRC Standard Mathematical Tables and Formulae. Boca Raton, FL: CRC Press, 1995.

Referenced on Wolfram|Alpha

Vertex Angle

Cite this as:

Weisstein, Eric W. "Vertex Angle." From MathWorld--A Wolfram Resource. https://mathworld.wolfram.com/VertexAngle.html

Subject classifications

  • Geometry
  • Trigonometry
  • Angles
Created, developed and nurtured by Eric Weisstein at Wolfram Research

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