Constrains two curves to maintain a point of tangency to each other or their extensions.

Button
Ribbon: Parametric tab
Geometric
panel
TangentNot available on the ribbon
in the current workspace
Menu: Parametric
Geometric
Constraints
TangentNot available in menus
in the current workspace
Toolbar: Geometric
Constraint
This command is equivalent to the Tangent option in GEOMCONSTRAINT.
Following are the valid constraint objects and points:
A circle can be tangent to a line even if the circle does not touch the line. A curve can be tangent to another even if they do not physically share a point.