Cavalieri, Buonaventura, Geometria indivisibilibvs continvorvm : noua quadam ratione promota

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244224GEOMETRIE
ALITER.
OMnia quadrata, BF, ad rectangula ſub, BF, & ſub portione,
BEG, ſunt vt, BF, ad portionem, BEG, rectangula verò
11Coroll. 1.
26.lib.2.
per A.23.
lib. 2.
ſub portione, BEG, &
parallelogrammo, BF, diuiduntur in re-
ctangula ſub, BEG, &
, BDE, trilineo . i. ſub trilineo, GEF, &
ſub, BEG, &
trilineo, GEF, & ſub, BEG, & eadem portione,
BEG, .
i. in omnia quadrata portionis, BEG, ergo omnia quadra-
ta, BF, ad omnia quadrata portionis, BEG, ſimul cum rectangu-
lis ſub portione, BEG, &
trilineo, GEF, bis ſumptis, vel omnia
quadrata, HF, ad omnia quadrata circuli, vel ellipſis, MBEG,
ſimul cum rectangulis ſub circulo, vel ellipſi, MBEG, &
trilineis,
MNG, GFE, bis ſumptis, erunt vt, BF, ad portionem, BEG,
vel vt, HF, ad circulum, vel ellipſim, MBEG, quod erat oſten,
dendum.
THEOREMA XV. PROPOS. XVI.
SI à parallelogrammo per lineam lateribus parallelam
parallelogrammum abſcindatur, quod intelligatur cir-
culo, vel ellipſi circumſcriptum, regula autem ſit parallelo-
grammi baſis :
Omnia quadrata circumſcripti parallelo-
grammi, ſimul cum rectangulis bis ſub eodem, &
ſub reli-
quo parallelogrammo per dictam parallelam conſtituto, ad
omnia quadrata dicti circuli, vel ellipſis, ſimul cum rectan-
gulis bis ſub eodem circulo, vel ellipſi, &
ſub quadrilineo
duabus parallelis circulum, vel ellipſim tangentibus, inclu-
ſaque ab ijſdem curua, &
latere totius parallelogrammi,
quod circulum, vel ellipſim non tangit, comprehenſo, erunt,
vt dictum circumſcriptum parallelogrammum ad eundem
circulum, velellipſim.
Sit ergo parallelogrammum, HO, cuius baſis, & regula, DO,
ductaque, NF, intra ipſum lateribus, HD, CO, parallela, ſit ab-
ſciſſum à toto parallelogrammo, HO, parallelogrammum, HF, in-
telligatur autem circumſcriptum circulo, vel ellipſi, MBEG, cuics
centrum, A, per quod tranſeant diametri, ME, &
, BG, quæ ſit
producta vſque in, P, erunt autem dictæ diametri parallelæ paralle-
logrammi, HO, lateribus, tranſibuntque per puncta

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