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[Commentary:
Further work on the 'Eis procheiron scholia', which follows Chapter XIX of Viète's Variorum responsorum liber VIII
(Viete 1593d, Chapter 19, . In the 1646 edition of Viete's Opera mathematica
this triangle is to be found on page ]
Vieta. resp. pag. 42, b. A. De Triangulis rectangulis
[Translation: Viète, Responsorum liber VIII, page 42v. On right-angled spherical ]
[Translation: Viète, Responsorum liber VIII, page 42v. On right-angled spherical ]