Theodosius <Bithynius>; Clavius, Christoph
,
Theodosii Tripolitae Sphaericorum libri tres
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LIBER SECVNDVS.</
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cuntur, cum communis ſectio plano-
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rum vtrumque circulum tetigerit.</
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<
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los ſunt.</
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<
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ſint B F, C E. </
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eſſe. </
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<
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nectatur recta A D, quæ ad circulum B F, re-
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cta erit, tranſibitq́; </
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<
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Quoniam igitur recta A D, ad circulũ B F,
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perpendicularis eſt, erit quoque ad circulũ
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parallelum C E, perpendicularis. </
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vndec.</
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tranſeat per centrum ſphæræ, vt oſtenſum
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eſt, cadet in polos circuli C E. </
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<
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A, D, poli circuli C E: </
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circuli B F. </
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<
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li B F, C E, circa eoſdem polos A, D, ſunt. </
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<
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los, ſunt paralleli.</
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