Biancani, Giuseppe
,
Aristotelis loca mathematica
,
1615
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34
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diſtantiæ linearum. </
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<
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id
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">ſimile dicendum eſt de ſecunda parte demonſtrationis.</
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<
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">29 Prima pars probatur ab impoſſibili. </
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<
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lia vni tertio &c. </
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">Idem dicendum de tertia parte.</
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<
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id
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">30 Probat eſſe parallelas ex 27. primi, quare est
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eiuſdẽ
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naturæ cum illa.</
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<
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Eandẽ
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habet
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rationẽ
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, quam 27. primi. </
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<
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id
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">32 Primò, probat
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anguiũ
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externum eſſe æqualem duabus internis, & ap
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poſitis ex eo, quòd partes anguli externi, ſint æquales partibus illorum: ex
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æqualitate.ſ partium infert
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æqualitatẽ
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totorum: quæ demonſtratio eſt per
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cauſam materialem. </
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<
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triangulus habet tres, &c. </
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<
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">quàm fuſiſſimè explicaui ſupra ad tex. 23. primi
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Poſter. vbi Ariſt. eam in exemplum perfectiſſimæ demonſtrationis adducit.</
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<
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">33 Partim per 4. primi, partim per 27. primi
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demõſtrat
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: quapropter ad
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earum naturam ſunt referendæ.</
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">34 Tria probat. </
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primũ
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, per 26. primi,
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ſecundũ
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per illud axioma, ſi æqua
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libus æqualia adijcias, tota ſunt æqualia, quod duobus angulis applicat.
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</
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<
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">quæ demonſtratio eſt à partibus ad tota: à cauſa nimirum materiali. </
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tium per 4. primi concludit.</
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<
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">35 Procedit per cauſam materialem: in omni enim caſu probat illa duo
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parallelogramma eſſe æqualia, quia ſi æqualibus æqualia adijciantur, tota
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erunt æqualia: vt in præcedenti dictum eſt.</
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">36 Probat duo eſſe æqualia, quia ſunt vni tertio æqualia: videlicet à ſi
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gno, à poſteriori.</
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<
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">37 Probat duo triangula eſſe æqualia, quòd ſint dimidia duorum paral
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lelogrammorum æqualium: eſt
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itaq;
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à cauſa materiali.</
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<
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">38 Eadem ratione demonſtrat in hac,
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in præcedenti.</
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<
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">39 Propoſitum probat, ad abſurdum deducendo aduerſarium.</
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<
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">40 Similiter demonſtrat ac in præcedenti 39.</
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<
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">41 Probat vnum eſſe duplum alterius, quòd ſit duplum alterius, quod il
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li æquale eſt. </
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<
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<
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">42 Probat parallelogrammum, &
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triangulũ
">triangulum</
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eſſe æqualia, quoniam
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vtrũ-que
">vtrun
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que</
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duplum ſit eiuſdem trianguli: videlicet per cauſam materialem.</
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<
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">43 Probat duo parallelogramma eſſe ęqualia, quoniam ablatis æquali
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bus ab æqualibus ſint reſidua. </
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<
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">cauſa eſt materialis.</
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<
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">44 Probat parallelogrammum æquari triangulo, quia
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vtrunq;
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cuidam
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tertio æquatur. </
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<
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<
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">45 Probat totum parallelogrammum æquari toti rectilineo; eo, quòd
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partes amborum totorum ſint æquales: eſt perſpicua cauſa materialis.</
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">46 Probat quadrilaterum quoddam eſſe quadratum ex definitione qua
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drati, quia ſ habet quatuor angulos rectos, & quatuor latera æqualia. </
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igitur à cauſa formali.</
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<
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">47 Probat quadratum lateris angulo recto ſubſenſi, eſſe æquale duobus
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quadratis reliquorum
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laterũ
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trianguli illius: & ratio deſumpta eſt à parti
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bus, quia. </
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<
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<
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dratis; ergo totum quadratum totis illis quadratis æquale eſt. </
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<
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cauſa materialis.</
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<
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">48 Probat angulum quendam eſſe rectum, eo, quòd æqualis ſit cuidam
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angulo recto. </
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<
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