This is a good method to use when applying geometric constraints to objects added to the sketch. The geometry is analyzed and geometric constraints are created based on the tolerances at the bottom of the dialog.
Select Curve tab > Sketch in Task Environment and set the Sketch Name drop-down in the Home tab > Sketch group to PROFILE to edit the sketch.
Select Home tab > Constraints group > Constraint Tools drop-down > Auto Constrain to display the Auto Constrain dialog.
Pick all the curves in the sketch.
Click Clear All then activate Horizontal, Vertical, Tangent, Perpendicular and Collinear.
Click OK to create the constraints. The constraint symbols display.
Select Home tab > Finish to exit the sketch.