Definition:Polyhedral Angle
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Definition
A polyhedral angle is a configuration in three-dimensional space such that $3$ or more half-lines meet at a common point such that the half-lines are the boundaries of planes.
Polyhedral angles are classified according to the number of edges they have.
Vertex
The vertex of a polyhedral angle is the common point at which the half-lines all meet.
Edge
Each of the half-lines that form a polyhedral angle is known as an edge of the polyhedral angle.
Face
Each of the planes bounded by the defining half-lines is known as a face of the polyhedral angle.
Face Angle
Each of the plane angles formed by a face and its bounding edges is known as a face angle of the polyhedral angle.
Also see
- Results about polyhedral angles can be found here.
Sources
- 1998: David Nelson: The Penguin Dictionary of Mathematics (2nd ed.) ... (previous) ... (next): polyhedral angle
- 2008: David Nelson: The Penguin Dictionary of Mathematics (4th ed.) ... (previous) ... (next): polyhedral angle