Philippi Lansbergii Triangvlorvm geometriae libri qvatvor : in quibus novâ & perspicuâ methodo, & apodeixei [romanized], tota ipsorum triangulorum doctrina explicatur .. (1631)
Lansberge, Philippe van, 1561-1632 · Amsterdami : Apud Gvilielmvm Blaevw · leaf 117
obltaui funt. P " II. Obliquus angulus eft qui acutus B ^ eftautobtufus. 12, Ácutus angulus eft qui recto minor eft: obtufus qui re- co major. | Jia in fiperiori figuva angulus ad. B, €8 C. eff acutus,ofW enm uterque veto ypinor : angulus ueró ad A obtufus efl, quiavetto major eft. 13. Si trianguli… … AC vl AD (AC emimG AD rada [mt , €9 proinde equales pey iy Definitionem primi elementorum ) ut. B G lateris fegmentum , ad BE. f'amentum Bafis.. Reile enim BD 6 B C à B punloextra circulum produtie fécant circulum 1n G €? E. ltqueper 36 Tertii elementorum , 4 BC ad BD: fia BG «d BE. quod erat…
Trigonometry -- Early works to 1800
Internet Archive · Fisher - University of Toronto · Public domain (published before 1931). Free to use for anything.
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