9 40 Further Notes and Views

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Back to 9_40.

In three-fold symmetrical form
Symmetrical triangular form
(less open)


(alternate)
Variant
Obtained by an epitrochoid.
Cylindrical depiction.
9.40 as a geodesic line of the oblate spheroid


Photo of an alsatian chair, musée de l'oeuvre Notre Dame, Strasbourg, France.