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

Table of contents

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[101.] SCHOLIVM.
[102.] I.
[103.] II.
[104.] III.
[105.] IIII.
[106.] V.
[107.] THEOREMA 20. PROPOS. 22.
[108.] THEOR. 21. PROPOS. 23.
[109.] FINIS LIBRI I I. THEODOSII.
[110.] THEODOSII SPHAERICORVM LIBER TERTIVS.
[111.] THEOREMA 1. PROPOS. 1.
[112.] THEOREMA 2. PROPOS. 2.
[113.] THEOREMA 3. PROPOS. 3.
[114.] THEOREMA 4. PROPOS. 4.
[115.] LEMMA.
[116.] THEOR. 5. PROPOS. 5.
[117.] THEOREMA 6. PROPOS. 6.
[118.] LEMMA.
[119.] THEOR. 7. PROPOS. 7.
[120.] THEOREMA 8. PROPOS. 8.
[121.] LEMMA. I.
[122.] LEMMA. I I.
[123.] THEOREMA 9. PROPOS. 9.
[124.] SCHOLIVM.
[125.] I.
[126.] II.
[127.] III.
[128.] THEOREMA 10. PROPOS. 10.
[129.] COROLLARIVM.
[130.] THEOR. 11. PROPOS. 11.
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9886
HOC _etiam Theorema demonſtrabitur ex propoſ. 8. buius lib. quemadmodum_
_propoſitio 9.
ex propoſ. 6. fuit oſtenſa, dummodo maximi circuli propoſ. 9. ex A,_
_prodeuntes tangant eundem circulum minoremillo, quem_ D C, _tangere debet, &
c._
THEOREMA 10. PROPOS. 10.
1111.
SI polus parallelorum ſit in circunferentia ma
ximi circuli, quem duo alij maximi circuli ad angu
los rectos ſecent, quorum alter ſit vnus parallelo-
rum, alter verò ſit obliquus ad parallelos;
in hoc
autein obliquo circulo ſumãtur duo quælibet pun
cta ad eaſdem partes maximi illius paralleli, perq́;
polum parallelorum, & per vtium que illorum pun
ctorum deſcribantur maximi circuli:
Erit, vt cir-
cunferentia maximi parallelorum intercepta inter
maximum circulum primò poſitum, &
proximum
maximum circulum per polum, &
per vnum pun-
ctorum deſcriptum, ad circunferentiam obliqui
circuli inter eoſdem circulos interceptam, ita cir-
cunferentia maximi parallelorum intercepta inter
duos magnos circulos per polum, perque vtrum-
que punctorum deſcriptos, ad circunferentiam
aliquam, quæ ſit minor, quam circunferentia obli-
qui circuli inter vtrum que punctum intercepta.
SIT polus A, parallelorum in circunferentia maximi circuli A B, quem
duo alij maximi circuli B D, C D, ſecent ad angulos rectos, &
ſit B D, paral-
lelorum maximus, &
C D, ad parallelos obliquus; in quo ſumptis duobus
punctis vtcunque E, F, deſcribantur per A, polum, &
per E, F, circuli ma-
2220. 1. huius ximi A E G, A F H.
Dico, vt eſt arcus B H, ad arcum C F, ita eſſe arcum H G,
ad arcum minorem arcu F E.
Aut enim arcus C F, F E, commenſurabiles
ſunt, aut incommenſurabiles.
Sint primum commenſurabiles, vt in prima fi-
gura;
& inuenta eorum maxima menſura P, diuidantur arcus C F, F E, in ar-
333. decimi. cus maximæ menſuræ æquales, perque puncta diuiſionum, &
polum A, circu-
4420. 1. huius li maximi ducantur I M, K N, L O.
Quoniam igitur arcus continui C L, L

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