Cavalieri, Buonaventura
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Geometria indivisibilibvs continvorvm : noua quadam ratione promota
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GEOMETRIÆ
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rint ſimiles, æquales, & </
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<
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iuſdam cylindrici oppoſitæ baſes.</
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<
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<
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">Sint duæ ſimiles figuræ planæ, & </
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<
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">æquales, AQTO, FDNC,
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non exiſtentes in eodem plano, & </
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<
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cuiuſdam cylindrici oppoſitas baſes. </
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<
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">Quoniam enim ſunt ſimiliter
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poſitæ erunt inter ſe æquidiſtantes, & </
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">earum incidentes pariter inter
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ſe æquidiſtantes, ducantur oppoſitæ tangentes figuræ, AQTO,
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quæ ſint, TP, AB, & </
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<
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">figuræ, FDNC, quæ ſint, FH, NL,
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huius.</
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quæque ſint regulæ homologarum earumdem ſimilium figurarum,
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& </
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">ſimilium figurarum ipſę, BP, HL, quę
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erunt parallelæ, & </
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<
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">quia ſunt incidentes ſimilium figurarum, AT,
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<
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FN, & </
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">oppoſitarum tangentium iam ductarum, ideò ad eaſdem ex
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eadem parte efficient angulos æquales, igitur angulus, BPT, erit
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<
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æqualis angulo, HLN, & </
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">ideò etiam, PT, ęquidiſtabitipſi, LN,
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<
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ſa 10. Vn-
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dec. Ele.</
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&</
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">, BA, ipſi, FH, iungantur, BH, PL,
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quoniam ergo, AT, FN, ſunt ſimiles,
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& </
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<
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">æquales, earum homologæ erunt pa-
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riter æquales, ſunt autem incidentes, BP,
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HL, vt ipſæ homologæ, vt colligitur in
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Coroll. </
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denter ab hac Propoſitione, ergo, BP, H
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L, erunt æquales, & </
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ergo eas iungentes, BH, PL, erunt ęqua-
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les, & </
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cidentes, BP, HL, ſimiliter ad eandem
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Elem.</
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partem in punctis, E, M, G, K, & </
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gantur, EG, MK, erit ergo, MP, ęqua-
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lis ipſi, KL, &</
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<
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ipſi, HG, nam quia, BP, HL, ſimiliter
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diuiduntur in his punctis, earum partes ſunt, vt ipſæ integræ, illæ
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verò ſunt æquales, & </
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<
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eas iungentes, PL, MK, EG, BH, erunt æquales, & </
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<
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<
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cimi El.</
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tes, ducatur à puncto, K, verſus figuram, FN, ipſa, KR, æquidi-
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ſtans ipſi, NL, quia ergo, MK, æquidiſtat ipſi, PL, &</
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<
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ipſi, NL, planum per, MK, KR, tranſiens æquidiſtat tranſeunti
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per, PL, LN, ſecet hoc planum tranſiens per, MK, KR, pla-
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num, AT, productum, in recta, SM, & </
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<
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