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

Table of contents

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[71.] THEOREMA 1. PROPOS. 1.
[72.] THEOREMA 2. PROPOS. 2.
[73.] SCHOLIVM.
[74.] THEOREMA 3. PROPOS. 3.
[75.] THEOREMA 4. PROPOS. 4.
[76.] THEOR. 5. PROPOS. 5.
[77.] THEOREMA 6. PROPOS. 6.
[78.] COROLLARIVM.
[79.] THEOREMA 7. PROPOS. 7.
[80.] SCHOLIVM.
[81.] THEOR. 8. PROP. 8.
[82.] SCHOLIVM.
[83.] THEOR. 9. PROPOS. 9.
[84.] SCHOLIVM.
[86.] THEOR, 10. PROP. 10.
[87.] THEOR. 11. PROP. 11
[88.] THEOR. 12. PROPOS. 12.
[89.] THEOREMA 13. PROPOS. 13.
[90.] PROBL. 1. PROP. 14.
[91.] PROBL. 2. PROPOS. 15.
[92.] SCHOLIVM.
[93.] THEOR. 14. PROPOS. 16.
[94.] SCHOLIVM.
[95.] THEOREMA 15. PROPOS. 17.
[96.] THEOR 16. PROPOS. 18.
[97.] THEOR. 17. PROPOS. 19.
[98.] THEOREMA 18. PROPOS. 20.
[99.] COROLLARIVM.
[100.] THEOREMA 19. PROPOS. 21.
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42
THEODOSII
SPHAE RICORVM
LIBER SECVNDVS.
44[Figure 44]
DEFINITIO.
IN ſphæra circuli ſe mutuo tangere di-
cuntur, cum communis ſectio plano-
rum vtrumque circulum tetigerit.
THEOREMA 1. PROPOS. 1.
111
IN ſphæra paralleli circuli circa eoſdem po-
los ſunt.
IN ſphæra A B C D E F, paralleli circuli
45[Figure 45] ſint B F, C E.
Dico eos circa eoſdem polos
eſſe.
Sint enim A, D, poli circuli B, F, & cõ-
2221. 1. huius. nectatur recta A D, quæ ad circulum B F, re-
cta erit, tranſibitq́;
per centrum ſphæræ.
3310. 1. huius. Quoniam igitur recta A D, ad circulũ B F,
perpendicularis eſt, erit quoque ad circulũ
parallelum C E, perpendicularis.
Quare cũ
44Schol. 14.
vndec.
tranſeat per centrum ſphæræ, vt oſtenſum
eſt, cadet in polos circuli C E.
Sunt ergo
558. 1. huius. A, D, poli circuli C E:
ſunt autem & poli
circuli B F.
In ſphæra igitur paralleli circu-
li B F, C E, circa eoſdem polos A, D, ſunt.
Quod erat demonſtrandum.
THEOREMA 2. PROPOS. 2.
662
IN ſphæra circuli, qui ſunt circa eoſdem po-
los, ſunt paralleli.

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