Relation Command
From GeoGebra Manual
- Relation[Object a, Object b]
- Shows a message box that gives you information about the relation of object a and object b.
This command allows you to find out whether
- two lines are perpendicular
- two lines are parallel
- two objects are equal
- a point lies on a line or conic
- a line is tangent or a passing line to a conic.
Note: Also see tool Relation.