DelMonte, Guidubaldo, In duos Archimedis aequeponderantium libros Paraphrasis : scholijs illustrata

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1rectælineę LK. Et non dixit, quia VC ſitipſi CX ęqualis.
Quare codicem græcum ita reſtituendum cenſeo. τὰκέντ<10>κ τῶν
τοῦ βὰ<10>εος μεγεθῶν
, vt vertimus.
*
Ob ſe〈que〉ntis verò demonſtrationis cognitionem, hoc pro
blema priùs oſtendemus.
PROBLEMA.
Duarum expoſitarum magnitudinum incommenſurabi­
lium altera vtcum〈que〉 ſecetur; magnitudinem tota ſecta ma­
gnitudine minorem, & altero ſegmentomaiorem, alteri ve­
rò expoſitæ magnitudini commenſurabilem inuenire.
Sint duæ magnitudi­
nes incommenſurabiles

AE BC. ſeceturquè ipſa­
rum altera, putà BC, vt­
cum〈que〉 in D. oportet
magnitudinem inuenire
minorem quidem BC,
maiorem verò BD, quæ ſitipſi AE commenſurabilis.
Au­
feratur ab AE pars dimidia, rurſus dimidiæ partis ipſius AE
dimidia auferatur; & eius, quæ remanet, adhuc dimidia; idquè
ſemper fiat, donec relinquatur magnitudo minor, quàm DE.
quod quidem perſpicuum eſt poſſe fieri ex prima decimi Eu­
clidis propoſitione.
ſitita〈que〉 AF, quæ minor exiſtat, quàm
DC. quippe quę AF, cùm ſit abla ta ex AE ſemper per dimi
diam partem, metietur vti〈que〉 AF ipſam AE. Deinde mul­
tiplicetur AF ſuper BD, tum demum multiplicatio vltima,
vel in puncto D cadet, vel minus.
ſi cadet; ſeceturex DE
magnitudo DG ęqualis AF. quod quidem fiet, quoniam AF
minor eſt DC. Quoniam igitur AF metitur BD, & DG;
metietur AF totam BG. Sed & ipſam AE metitur; etgo
AF ipſarum BG AE communis exiſtit menſura, ac propte­
rea BG ipſi AE commenſurabilis exiſtir; quæ quidem BG
minor eſt BC, maior verò BD. Si verò multi­
plicatio ipſius AF ſuper BD non cadet in D. ſed in H,
erit vti〈que〉 HD minor AF. nam ſi HD ipſi AF eſſet ęqualis,

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