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

Table of contents

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[261.] PROBL. IV. PROP. XXXIII.
[262.] PROBL. V. PROP. XXXIV.
[263.] DEFINITIONES. I.
[264.] II.
[265.] LEMMA X. PROP. XXXV.
[266.] THEOR. XXI. PROP. XXXVI.
[267.] THEOR. XXII. PROP. XXXVII.
[268.] SCHOLIVM.
[269.] LEMMA XI. PROP. XXXVIII.
[270.] LEMMA XII. PROP. XXXIX.
[271.] THEOR. XXIII. PROP. XXXX.
[272.] COROLL. I.
[273.] COROLL. II.
[274.] COROLL. III.
[275.] PROBL. VI. PROP. XXXXI.
[276.] PROBL. VII. PROP. XXXXII.
[277.] COROLL.
[278.] THEOR. XXIV. PROP. XXXXIII.
[279.] THEOR. XXV. PROP. XXXXIV.
[280.] SCHOLIVM.
[281.] THEOR. XXVI. PROP. XLV.
[282.] COROLL.
[283.] THEOR. XXVII. PROP. XLVI.
[284.] COROLL. I.
[285.] COROLL. II.
[286.] THEOR. XXVIII. PROP. XLVII.
[287.] THEOR. XXIX. PROP. XLVIII.
[288.] THEOR. XXX. PROP. XLIX.
[289.] THEOR. XXXI. PROP. L.
[290.] COROLL.
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24258 anguli ad H, I ſunt æquales, ergo triangula D H M, A I L ſunt æquiangu-
la, hoc eſt angulus D M H æqualis erit angulo A L I, ac ideo D M, A L
inter ſe æquidiſtant.
Quod vltimò demonſtrandum erat.
SCHOLIVM.
PRoportionalitas, quàm primo loco ſuperioris theorematis inter ſemi-
diametros concentricorum quadrantum N G E, O G B ſimilium Elli-
pſium inuenimus, eadem penitùs reperietur in alijs deinceps quadrantibus,
&
ad verticem, vt per ſe ſatis patet.
THEOR. XXVI. PROP. XLV.
In Hyperbola intra angulum aſymptotalem; vel in Parabolis
parallelis, ſiue in Hyperbolis, aut Ellipſibus ſimilibus, &
concen-
tricis circa eandem diametrum per diuerſos vertices ſimul adſcri-
ptis, portiones omnes anguli, vel exterioris ſectionis, quarum ba-
ſes interiorem ſectionem contingant, inter ſe ſunt æquales.
200[Figure 200]
SIt intra angulum aſymptotalem A B C deſcripta Hyperbole D E F, vt
in prima figura, vel duæ æquidiſtantes Parabolæ A B C, D E F, vt in
ſecunda;
vel ſimiles concentricæ Hyperbolæ, vt in tertia, aut Ellipſes, vt in
quarta, quarum commune centrum ſit G, ac omnes per diuerſos vertices
B, E ſint ſimul adſcriptæ circa eandem diametrum G B E, &
ad verticem E
interiorem ſectionem contingat recta A E C, &
ad quodcunque aliud

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