def demo_GeometricConstraints_addCoincident(sketch: adsk.fusion.Sketch):
# Create a sketch point and arc.
point = sketch.sketchPoints.add(adsk.core.Point3D.create(0, 0, 0))
arc = sketch.sketchCurves.sketchArcs.addByThreePoints(adsk.core.Point3D.create(15, 14, 0),
adsk.core.Point3D.create(9, 11, 0),
adsk.core.Point3D.create(7, 13, 0))
# Create a coincident constraint between the point and the arc.
constraints = sketch.geometricConstraints
coincidentConstraint = constraints.addCoincident(point, arc)