![https://commons.wikimedia.org/wiki/File:Euclid_Tetrahedron_4.svg](https://www.futilitycloset.com/wp-content/uploads/2018/06/2018-06-29-a-curious-cut-1.png)
A puzzle from Knowledge, Feb. 1, 1887:
“Show how to cut a regular tetrahedron (equilateral triangular pyramid) so that the face cut shall be a square.”
A puzzle from Knowledge, Feb. 1, 1887:
“Show how to cut a regular tetrahedron (equilateral triangular pyramid) so that the face cut shall be a square.”