DelMonte, Guidubaldo
,
In duos Archimedis aequeponderantium libros Paraphrasis : scholijs illustrata
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tur KN FL IM, quæ diametrum BD ſecent in punctis
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STV. oſtendendum eſt, lineas KN FL IM baſi AC ęqui
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diſtantes eſſe. </
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<
s
id
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">deinde diametrum BD lineas KN FL IM
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bifariam in punctis STV diuidere poſtremo lineas KN F
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IM ita diametrum BD diſpeſcere, vt poſito vno BS, linea ST
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ſit tria, TV quin〈que〉; & VD ſeptem. </
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<
s
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">Producantur FE KH
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ad RX. quoniam enim FR eſt æquid
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tans BD, erit AE
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EB, vt AR ad RD; eſt〈que〉 AE ipſi EB æqualis ergo AR i
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pſi RD æqualis exiſtit. </
s
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<
s
id
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">eodem què modo oſtendetur FX æ
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qualem eſſe XT. quandoquidem eſt FX ad XT, vt FH ad
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HB. ſimiliterquè ad alteram partem, exiſtentibus LO NP i
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pſi BD æquidiſtantibus, erit DO ipſi OC æqualis, & TP
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ipſi PL. quod quidem eodem prorſus modo demonſtrabi
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tur. </
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<
s
id
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">Quoniam autem AC bifariam à diametro diuiditur in
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puncto D, erit DR ipſi DO æqualis, cùm vnaquæ〈que〉 ſit
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dimidia ipſarum AD DC æqualium. </
s
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<
s
id
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">eſt igitur RD dimidia
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ipſius AD, quæ dimidia eſt baſis AC. quod idem euenit ipſi
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DO. quare BD ſeſquitertia eſt ipſius FR, & ipſius LO, ex de
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cimanona Archimedis de quadratura paraboles. </
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<
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">ac propterea
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eandem habet proportionem BD ad FR, quam ad LO.
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ſequitur FR æqualem eſſe ipſi LO. & obid FL ipſi AC
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expan
abbr
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æ-quidiſtantẽ
">æ
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quidiſtantem</
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eſſe. </
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<
s
id
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">& FT ipſi RD, & TL ipſi DO ęqualem.
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vnde FT ipſi TL ęqualis exiſtit. </
s
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<
s
id
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">eadem quèratione prorſus in
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portione FBL oſtendetur KN ipſi FL, ac per conſe〈que〉ns i
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pſi AC ęquidiſtantem eſſe. </
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<
s
id
="
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">& KS ipſi SN æqualem exiſte
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re. </
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<
s
id
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">Producatur IG ad Z, quæ ipſam AB ſecet in 9. linea ve
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rò LO ſecet BC in
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q;
">〈que〉</
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ductaquè MY ipſi BD æquidiſtans
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ipſam ſecet BC in
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grc
">α</
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. & quoniam IZ eſt æquidiſtans FR, e
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rit AG ad GF, ut A9 ad 9E, & AZ ad ZR. & eſt AG
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GF æqualis, erit igitur A9 ipſi 9E, & AZ ipſi ZR æquaiis.
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Eodemquè modo oſtendetur C
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grc
">α</
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ipſi
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">α</
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Q, & CY ipſi YO ę
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qualem eſſe. </
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<
s
id
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">quo niam autem in portione AFB a dimidia baſi
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ducta eſt LF, à puncto autem 9, hoc eſt à dimidia dimidię ba
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ſis AB (eſt enim E9 dimidia ipſius AE, quæ dimidia eſt baſis
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AB) ducta eſt 9I diametro æquidiſtans, erit EF ſeſquitertiai
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pſius I9 pari〈que〉 ratione oſtendetur QL ſeſquitereiam eſſe i
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pſius M
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grc
">α</
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quare vt FE ad I9, ita LQ ad M
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grc
">α</
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>
. obſimilitudinem </
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</
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