Personally, I'd fold the paper, superimposing the reflected half-ellipse, crease it, unfold, rotate ~90 degrees and repeat!
Dave -----Original Message----- From: sundial [mailto:sundial-boun...@uni-koeln.de] On Behalf Of Frank King Ancillary Question: I hand you a perfect ellipse drawn on a sheet of paper. The ellipse is unornamented. What is the geometrical construction required to determine the axes? Aren't sundial questions fun? Frank --------------------------------------------------- https://lists.uni-koeln.de/mailman/listinfo/sundial --------------------------------------------------- https://lists.uni-koeln.de/mailman/listinfo/sundial
