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

Table of contents

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[151.] LEMMA VII. PROP. LXVI.
[152.] SCHOLIVM.
[153.] PROBL. XXV. PROP. LXVII.
[154.] MONITVM.
[155.] PROBL. XXVI. PROP. LXVIII.
[156.] PROBL. XXVII. PROP. LXIX.
[157.] PROBL. XXVIII. PROP. LXX.
[158.] LEMMA VIII. PROP. LXXI.
[159.] LEMMA IX. PROP. LXXII.
[160.] PROBL. XXIX. PROP. LXXIII.
[161.] LEMMA X. PROP. LXXIV.
[162.] PROBL. XXX. PROP. LXXV.
[163.] COROLL. I.
[164.] COROLL. II.
[165.] MONITVM.
[166.] THEOR. XXXVI. PROP. LXXVI.
[167.] SCHOLIVM.
[168.] THEOR. XXXVII. PROP. LXXVII.
[169.] PROBL. XXXI. PROP. LXXVIII.
[170.] MONITVM.
[171.] LEMMA XI. PROP. LXXIX.
[172.] LEMMA XII. PROP. LXXX.
[173.] THEOR. XXXVIII. PROP. LXXXI.
[174.] PROBL. XXXII. PROP. LXXXII.
[175.] COROLL.
[176.] THEOR. XXXIX. PROP. LXXXIII.
[177.] ALITER affirmatiuè.
[178.] PROBL. XXXIII. PROP. LXXXIV.
[179.] SCHOLIVM.
[180.] THEOR. XL. PROP. LXXXV.
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THEOR. X. PROP. XIV.
Si in Hyperbola ſumpta fuerint duo quælibet puncta, è quo-
rum vno ducta ſit recta linea, alteri aſymptoto æquidiſtans,
aliamque ſecans;
ex reliquo verò alia vtranque aſymptoton di-
uidens in angulo, qui aſymptotali deinceps eſt, à qua, producta
in angulo ad verticem aſymptotalis, ſumatur ęqualis ei, quę ex
ipſa inter prædictum punctum, &
alteram aſymptoton interci-
pitur, atque ex ſumptæ termino ducta ſit parallela ei aſympto-
to, cui prima eductarum occurrit, hanc ipſam ſecans:
recta li-
nea huiuſmodi interſectionem iungens cum puncto, in quo ſe-
cunda eductarum eam aſymptoton ſecat, cui prima æquidiſtat,
rectæ data puncta iungenti æquidiſtabit.
159[Figure 159]
SInt in Hyperbola A B, cuius aſymptoti C D, C E, ſumpta duo
quæcunque puncta A, B, è quorum altero A ducta ſit A E I alteri
aſymptoto C D æquidiſtans, ex B verò quælibet B G F vtranque ſecans
in G, &
F; ſectaque G H in directum, & æquali ipſi B F, ducatur ex H
recta H I parallela ad C E occurrens cum productis D C, A E in L, &

I.
Dico iunctas A B, F I eſſe inter ſe parallelas.
Ducta enim B D parallela ad C E, iunctaque D E, cum ſit B F æqua-
lis G H, erit quoque D F æqualis C L, ob parallelas D B, G E, HI, ſed
eſt C L æqualis ipſi E I, quare D F, &
E I æquales erunt, ſuntque etiam
parallelæ, ergo F I æquidiſtat ipſi D E, ſed eſt A B æquidiſtans 1113. h. D E, quare F I, &
A B ſunt quoque inter ſe parallelæ. Quod, & c.

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