Theodosius <Bithynius>; Clavius, Christoph
,
Theodosii Tripolitae Sphaericorum libri tres
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ca ſuperficie tangat, obliquus erit ad alios circulos, quos ſecat, paral
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lelos ei, quem tangit.</
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<
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xml:space
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">_IN_ eadem figura maximus circulus _A B,_ tangat circulum _A G,_ ſecet autem circu
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lum _C D,_ ipſi _A G,_ parallelum. </
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<
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_A B,_ obliquum eſſe ad circulum _C D._ </
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<
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enim maximus circulus A B, tangens circulum
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_A G,_ non tranſit per ipſius polos, (Si namque per
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ipſius polos duceretur, ſecaret ipſum bifariam,
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non autem tangeret.) </
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<
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los circuli _CD;_ </
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_A G, C D,_ eoſdem polos) non ſecabit maximus
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circulus _A B,_ circulum _C D,_ ad angulos rectos:
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<
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eſt ad circulum _C D._ </
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<
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ximus circulus per eorum polos ductus ſecabit bi
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fariam ſegmenta ipſorum circulorum.</
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">IN ſphæra ſe mutuo ſecent duo circuli A B C D, E D F B, in punctis B,
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D, & </
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los dictos in punctis A, C, E, F. </
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menta B A D, B C D, B E D, B F D. </
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niam enim circulus maximus A F C E, cir-
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culos A B C D, E D F B, ſecat bifariam, & </
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ad angulos rectos, quòd per eorum polos du
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ctus ſit, erunt communes ſectiones A C, E F,
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quas cum ipſis facit, diametri ipſorum ſecan
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tes ſeſe in G. </
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A C, E F, cum in eodẽ plano circuli A F C E,
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exiſtant, ſitq́; </
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<
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& </
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<
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cta. </
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lorum A B C D, EDFB; </
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muni eorum ſectione: </
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eorum ſectio linea recta. </
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<
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oſtenſus eſt ſecare ad angulos rectos vtrumque circulum A B C D, E D F B,
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crit viciſsim vterque rectus ad circulum AFCE; </
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munis eorum ſectio ad eundem perpendicularis erit. </
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