Video Tutorial Geometric Constraint Tangent

Geometric Constraint Tangent is Constrains two curves to maintain a point of tangency to each other or their extensions. 

This command is equivalent to the Tangent option in GEOMCONSTRAINT.
Following are the valid constraint objects and points:

• Line
• Polyline segment
• Circle, arc, Polyline arc, ellipse
• Combination of circles, arcs, or ellipses

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.