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

Table of contents

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[91.] COROLLARIVM II.
[92.] LEMMA PRO ANTECED. PROP.
[93.] THEOREMA XX. PROPOS. XXIII.
[94.] COROLLARIVM.
[95.] THEOREMA XXI. PROPOS. XXIV.
[96.] COROLLARIVM.
[97.] THEOREMA XXII. PROPOS. XXV.
[98.] COROLLARIVM.
[99.] THEOREMA XXIII. PROPOS. XXVI.
[100.] THEOREMA XXIV. PROPOS XXVII.
[101.] COROLLARIVM.
[102.] THEOREMA XXV. PROPOS. XXVIII.
[103.] DEFINITIO.
[104.] SCHOLIV M.
[105.] LEMMA I.
[106.] LEMMA II.
[107.] LEMMA III.
[108.] LEMMA IV.
[109.] COROLLARIVM.
[110.] LEMMA V.
[111.] COROLLARIV M.
[112.] LEMMA VI.
[113.] COROLLARIVM.
[114.] THEOREMA XXVI. PROPOS. XXIX.
[115.] THEOREMA XXVII. PROPOS. XXX.
[116.] LEMMA.
[117.] THEOREMA XXVIII. PROPOS. XXXI.
[118.] DEFINITIO.
[119.] DEFINITIO.
[120.] THEOREMA XXIX. PROPOS. XXXII.
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3717LIBER I. tium, ACBD, AB, CD, & producantur donec ſibi occurrant, oc-
current autem, quia hæc planis ſe inuicem ſecantibus ſunt parallela,
&
ſit ab illis comprehenſum ſolidum, ZF, erit igitur, ZF, paralle-
ſepipedum, cum eius oppoſita plana ſint inuicem parallela, quæ tan-
gunt ſolidum, ACBD, vt in punctis, A, C, B, D, E, X, &
ideò
erit ſolido, ACBD, circumſcriptum, habens plana oppoſita pro-
11Def. 15. poſitis planis ſe ſecantibus parallela;
quod efficere opus erat.
SCHOLIVM.
_P_Oteſt autem contingere in antecedentis Propoſ. figura ipſam eſſepa-
railelogrammum, &
line as rectas ſe ſecantes, qutbus parallelo-
grammi circumſcriptibilis latera debent eſſe parallela, eſſe ipſa paralle-
logrammi latera, in quo caſu idem eſſet parallelogrammum circumſcri-
ptum, &
cui circumſcriberetur: V eluti hic etiam ſi ſolidum, ACBD,
eſſet parallelepipedum, cuius oppoſitis planis, plana circum ſcrip tibilis
deberent eſſe pacallela, tunc enim idem eſſet parallelepipedum circum-
ſcriptum, &
cui cir cumſcriberetur: Contactus autem in antecedenti po-
teſt etiam eſſe in linea, &
in bac tum in linea, tum in planis, licet con-
tactus, qui fit in punctis tantum expoſitus fuerit.
THEOREMA I. PROPOS. IV.
DAta quacumq; figura plana, vel ſolida, & in plana da-
ta recta linea, in ſolida verò dato plano;
qualibet li-
nea, vel planum, quod indefinitè productum non tangat fi-
guram dictam planam, vel ſolidam, in vertice ſumpto reſpe-
ctu dictæ lineæ, vel plani, vel totum extra, vel aliquid eius
intra figuram cadit, nempè figuram ſecat, ſi linea lineæ, vel
planum plano æquidiſtet.
Sit data figura plana, CARB,
12[Figure 12]&
in ea recta, AB, ſit vertex vnus
reſpectuipſius, AB, punctus, C,
&
ſit recta, HM, parallela ipſi,
AB, quæ etiam indefinitè produ-
cta non tangat figuram, ARBC,
in, C, vertice.
Dico, HM, vel
totam extra figuram cadere, vel
eandem ſecare.
Neutrum efficiat
ſi poſſibile eſt, igitur, HM, tan-
get figuram, CARB, &
non in,
C, igitur in alio puncto, vt in, E,
igitur, E, erit vertex figuræ, CA
RB, reſpectu ipſius, AB, eſt e-
22A. Def. @
huius.
tiam, C, vertēx eiuſdem reſpectu eiuſdem, AB, ergo ſi per,

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