Translations:Sketcher ConstrainTangent/3/en

There are five different ways the constraint can be applied:
 * 1) between two curves (available not for all curves)
 * 2) between two endpoints of a curve, making a smooth joint
 * 3) between a curve and an endpoint of another curve
 * 4) between two curves at user-defined point
 * 5) between two lines to create a collinear condition