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

Table of contents

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[221.] THEOR. I. PROP. III.
[222.] LEMMA III. PROP. IV.
[223.] THEOR. II. PROP. V.
[224.] THEOR. III. PROP. VI.
[225.] LEMMA IV. PROP. VII.
[226.] THEOR. IV. PROP. VIII.
[227.] THEOR. V. PROP. IX.
[228.] SCHOLIVM.
[229.] THEOR. VI. PROP. X.
[230.] THEOR. VII. PROP. XI.
[231.] THEOR. VIII. PROP. XII.
[232.] THEOR. IX. PROP. XIII.
[233.] THEOR. X. PROP. XIV.
[234.] THEOR. XI. PROP. XV.
[235.] LEMMA V. PROP. XVI.
[236.] COROLL.
[237.] THEOR. XII. PROP. XVII.
[238.] THEOR. XIII. PROP. XVIII.
[239.] THEOR. XIV. PROP. XIX.
[240.] PROBL. I. PROP. XX.
[241.] MONITVM.
[242.] THEOR. XV. PROP. XXI.
[243.] PROBL. II. PROP. XXII.
[244.] PROBL. III. PROP. XXIII.
[245.] MONITVM.
[246.] THEOR. XVI. PROP. XXIV.
[247.] THEOR. XVII. PROP. XXV.
[248.] COROLL.
[249.] THEOR. XIIX. PROP. XXVI.
[250.] COROLL. I.
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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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