Definition:Angle

Definition
Let $\LL_1$ and $\LL_2$ be two lines which intersect at a point $\PP$.

The angle between $\LL_1$ and $\LL_2$ is defined as the inclination between $\LL_1$ and $\LL_2$ at $\PP$.



Also see

 * Definition:Directed Angle
 * Definition:Rotation Angle
 * Definition:Solid Angle