def demo_Ellipses_add(sketch: adsk.fusion.Sketch):
# Define three points
centerPoint = adsk.core.Point3D.create(0,0,0)
majorAxisPoint = adsk.core.Point3D.create(10,0,0)
throughPoint = adsk.core.Point3D.create(5,4,0)
# Create an ellipse based on the points
sketchEllipse = sketch.sketchCurves.sketchEllipses
ellipse = sketchEllipse.add(centerPoint, majorAxisPoint, throughPoint)