bliquangulo A B D,a vertice A ducatur pcrpcndicularisA C.Et contiuuatis lateribus B A,D Auna cura perpendiculo A C tifque adquadrantes , videlicet AL, AF, AI;ab A vertice defcribatur peripheriaIF L,menfura angulorum verticaliuralAF, I AL, qui aequantur angulisBAC.DAC Et a pun&is angulari-bus… … Sinus AH . AH. \Sinus Totus A I . A I.jSmus HG.HM. C-Sinus IL. I F. Et contra ; (Sinus H G. Ergo li5*** H^. h f-ì Smus I L. ^ [Sinus I F. Qnod erat demonftrandum. Confeótarium 5. In Triangulis Obliquangulis : Si perpendìcularis ducatur ab angulo verticali in latusoppofitum (fiopusfit continuatami)…
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