Trefoil Knot in Paper forms Pentagon/Mistake

Source Work

1992: David Wells: Curious and Interesting Puzzles:

The Puzzles:

Henry van Etten

$126$

Mistake

The next problem occurs first in Urbino d'Aviso's treatise on the sphere (1682):

Correction

The mathematician in question is Urbano d'Aviso.

Sources

• 1992: David Wells: Curious and Interesting Puzzles ... (previous) ... (next): Henry van Etten: $126$