Theodosius <Bithynius>; Clavius, Christoph, Theodosii Tripolitae Sphaericorum libri tres

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CHRISTOPHORI CLAVII
BAMBERGENSIS E
SOCIETATE IESV
TRIANGVLA SPHÆRICA.
PRÆFATIO.
195[Figure 195]
XPLICATIS ijs, quæ ad
triangulorum rectilineorum
ſcientiam, qua ex angulis no-
tis latera, &
vicißim ex notis
lateribus anguli cognoſcũtur,
neceſſaria eſſe duximus;
reli-
quum eſt, vt sphæricorum etiam triangulorum
doctrinam, qua arcus ex cognitis angulis, et con
tra, anguli ex arcubus notis inquiruntur, tra-
damus.
Quamuis enim Menelaus, qui etiam
Mileus, nobilis ſcriptor, qui temporibus Traia-
ni Imperatoris floruit, vt auctor eſt Ptolemæus,
11Lib. 7. Al-
mag. cap. 1.
acutißimos tres libros de triãgulis ſphæricis com
poſuerit, non tamen eius ordinem nos in hiſce no
ſtris sphæricis triangulis ſequemur;
propterea
quòd &
plurimas eius propoſitiones, licet iucun-
dißimæ ſint, mira{q́ue} eruditione refertæ,

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