"Simple Simon" wrote in message

It's only a contradiction if one chord from leading edge to
trailing edge is envisioned. That is what you envisioned but
your vision is apparently limited. The chord I referred to
is a combination of many small straight lines (chords) that
describe the curve in question.

What a feeble wriggle.


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Wally
I demand rigidly-defined areas of uncertainty!
www.art-gallery.myby.co.uk