Viviani, Vincenzo, De maximis et minimis, geometrica divinatio : in qvintvm Conicorvm Apollonii Pergaei

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[121.] THEOR. XXVI. PROP. XXXXVIII.
[122.] MONITVM.
[123.] THEOR. XXVII. PROP. XXXXIX.
[124.] THEOR. XXVIII. PROP. L.
[125.] COROLL.
[126.] PROBL. XVII. PROP. LI.
[127.] PROBL. XVIII. PROP. LII.
[128.] ALITER.
[129.] ALITER breuiùs.
[130.] PROBL. XIX. PROP. LIII.
[131.] ALITER.
[132.] ALITER breuiùs.
[133.] PROBL. XX. PROP. LIV.
[134.] ALITER breuiùs.
[135.] PROBL. XXI. PROP. LV.
[136.] PROBL. XXII. PROP. LVI.
[137.] COROLL. I.
[138.] COROLL. II.
[139.] PROBL. XXIII. PROP. LVII.
[140.] COROLL.
[141.] THEOR. XXIX. PROP. LIIX.
[142.] ALITER.
[143.] THEOR. XXX. PROP. LIX.
[144.] THEOR. XXXI. PROP. LX.
[145.] THEOR. XXXII. PROP. LXI.
[146.] THEOR. XXXIII. PROP. LXII.
[147.] SCHOLIVM.
[148.] THEOR. XXXIV. PROP. LXIII.
[149.] THEOR. XXXV. PROP. LXIV.
[150.] PROBL. XXIV. PROP. LXV.
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10480 erunt ſimiles, at ſunt per verticem E ſimul adſcriptæ, vnde PEQ minorum
laterum inſcripta erit Hyperbolæ DEF maiorum laterum:
& infra 115. Co-
roll. 19. h.
applicata quacunque TVP;
cum Hyperbolæ ABC, PEQ ſint congruentes,
&
per diuerſos vertices ſimul adſcriptæ erit intercepta AX maior 2244. h. pta TP: cumque Hyperbolæ DEF, PEQ ſint ſimiles, ac per eundem verti-
cem ſimul adſcriptæ erit intercepta DX minor intercepta VP, vnde 3341. h. intercepta AD omnino erit maior reliqua intercepta TV;
& hoc ſemper:
quare huiuſmodi Hyperbolæ ABC, DEF ſunt ad ſe propiùs accedentes.
Quod erat ſecundò, &
c.
72[Figure 72]
Tandem, bifariam ſectis tranſuerſis lateribus GB, GE, RE, in Y, Z, K,
erit Y centrum Hyperbolæ ABC, Z verò centrum DEF, ac demum K cen-
trum PEQ:
& cum ſit GB minor GE, erit dimidium GY minus dimidio GZ;
quare punctũ Z cadit infra Y: cumq; ſit EG maior ER, erit dimidiũ EZ maius
dimidio EK, vnde K punctum cadit infra Z.
Si ergo ex Hyperbolarum cen-
tris Y, Z, ducantur earum aſymptoti Y 2, Z 3, K 4, erit Z 3, parallela 44Coroll.
41. huius.
K 4, &
Y 2 æquidiſtabit eidem K 4; quare aſymptoti omnes Y 2, Z 3, 55Coroll.
44. h.
erunt inter ſe parallelæ:
& cum Y 2 ſit aſymptotos ABC, & Z 3 ſit intra an-
gulum ab aſymptotis comprehenſum, ipſa ſectionem ABC ſecabit, vt in 66Coroll.
11. h.
per quod ordinatim ducta recta 2 3 4, alias aſymptotos ſecantin 2 4, infra
ipſam applicetur quælibet alia TVP, ſingulas Hyperbolas ſecans in T, V, P.
Erit intercepta TP maior ſemper interuallo 2 4, ſed ablata intercepta 7744. h. eſt ſemper minor ablato interuallo 3 4, vnde reliqua intercepta TV 8841. h. datas ſectiones A B C, D E F, erit omnino maior reliquo interuallo 2 3,
quod inter datarum ſectionum parallelas aſymptotos eſt interceptum, ac
iuxta ordinatim ductis æquidiſtantes metitur.
Quod erat vltimò demon-
ſtrandum.

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