Angle

angle2d(Conic)

angle2d(Line)

angle2d(Line, Line)

angle3d(Plane, Line)

angle3d(Plane, Plane)

angle3d(Plane, Segment)

angle(Point, Point, Point)

angle(Polygon, Integer)

angle(Triangle, Integer)

Computes the angle between a conic and the line $\{y=0\}$. For instance, if the conic is an ellipse, the angle computed is the angle formed by the line passing through the focus and the horizontal axis. If the conic is a parabola, the axis of symmetry is considered.

Computes the angle between a line and the horizontal axis.

Computes the angle between two lines.

Computes the angle between a plane and a line.

Computes the angle between two planes.

Computes the angle between a plane and the line defined by a segment.

Given three points $A$, $B$ and $C$, computes the angle between the lines created joining the points $A$ and $B$, and $B$ and $C$.

Given a polygonal or polygon and an integer $i$, computes the angle of the $i$-th vertex.

Given a triangle and an integer $i$, computes the angle of the $i$-th vertex.

Initial angle