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

Table of contents

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[51.] COROLL. III.
[52.] THEOR. VI. PROP. XIV.
[53.] COROLLARIVM.
[54.] THEOR. VII. PROP. XV.
[55.] THEOR. VIII. PROP. XVI.
[56.] THEOR. IX. PROP. XVII.
[57.] MONITVM.
[58.] THEOR. X. PROP. XVIII.
[59.] Definitiones Secundæ. I.
[60.] II.
[61.] III.
[62.] IV.
[64.] VI.
[65.] VII.
[66.] VIII.
[67.] IX.
[68.] THEOR. XI. PROP. XIX.
[69.] COROLL. I.
[70.] COROLL. II.
[71.] COROLL. III.
[72.] COROLL. IV.
[73.] COROLL. V.
[74.] COROLL. VI.
[75.] PROBL. VI. PROP. XX.
[76.] COROLL. I.
[77.] COROLL. II.
[78.] PROBL. VII. PROP. XXI.
[79.] MONITVM.
[80.] THEOR. XII. PROP. XXII.
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5434 patet quomodo cuilibet horum trilineorum circumſcribi poſſit figura ex
æque-altis parallelogrammis, &
c. quæ ſuperet proprium trilineum magni-
tudine, quæ minor ſit quacunque magnitudine propoſita.
Iam dico huiuſmodi trilinea inter ſe eſſe æqualia. Nam ſi ſint inæqualia,
alterum ipſorum, vt puta AHBCGA altero AHBE minus erit, &
defectus ſit
ſpacium V;
quo poſito circumſcribatur, vti nuper docuimus, trilineo AHB
CGA figura ex parallelogrammis SC, TN, VO, HP, &
c. cuius exceſſus ſupra
trilineum ſit minor magnitudine V.
quapropter talis figura adhuc minor erit
trilinco AEBHA, cui circumſcribatur, item per eaſdem lineas ipſi CB æqui-
31[Figure 31] diſtantes, figura ex totidem parallelogrammis EY, 1Z, 2&
, 3I, & c. Patet nũc
talem circumſcriptam, alteri circumſcriptæ ABD 567, &
c. ęqualem eſſe, cum
vtraq;
ipſarum ex æqualibus numero, & magnitudine parallelogrammis cõ-
ſtet vtrunq;
vtrique: (parallelogramma enim EY, BD, ſunt inter eaſdem pa-
rallelas, &
ſuper æqualibus baſibus EB, BE; & parallelogrammum IZ æqua-
tur parallelogrãmo Q5, cum inter eaſdem ſint parallelas, &
ſuper æqualibus
baſibus IQ, QN, &
ſic de ſingulis) ſed circumſcripta ABD 567, & c. eſt 113. Co-
roll. 13. h.
nor trilineo AEBHA, vt modò oſtendimus, ergo &
circumſcripta AEBYZ
&
I, & c. minor erit eodem trilineo AEBHA; totum parte, quod eſt abſurdũ.
Quare huiuſmodi trilinea inter ſe ſunt æqualia. Quod oſtendere propoſi-
tum fuit.

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