Given two intersecting lines or line segments, the amount of rotation about the point of intersection (the vertex) required to bring one into correspondence with the other is called the angle theta between them. The term "plane angle" is sometimes used to distinguish angles in a plane from solid angles measured in space (International Standards Organization 1982, p. 5). The term "angle" can also be applied to the rotational offset between intersecting planes about their
割引売上 Angle - 小物
Wolfram, Alpha Meets MathWorld—Wolfram
Tangential Angle -- from Wolfram MathWorld
Directed Angle -- from Wolfram MathWorld
Central Angle -- from Wolfram MathWorld
Orthogonality (mathematics) - Wikipedia
Brocard Angle -- from Wolfram MathWorld
Steinmetz Solid - From Wolfram MathWorld, PDF
Steiner Angles -- from Wolfram MathWorld
Angles: Definition, Parts, Types, Degrees, Properties, Examples
Angles: Definition, Parts, Types, Degrees, Properties, Examples