Huygens, Christiaan, Christiani Hugenii opera varia; Bd. 2: Opera geometrica. Opera astronomica. Varia de optica

Table of figures

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[41] Fig. 2.D B G H C E F
Page: 93
[42] Fig. 4.E C G A F B D
Page: 93
[43] Fig. 3.E C D F G H I
Page: 93
[44] Fig. 5.B F R C P L M O
Page: 93
[45] Fig. 6.Y S H E K B C G F R A L D N P M Z X V T
Page: 93
[46] Fig. 7.G F D M L E A K C B H
Page: 93
[47] Pag. 386.TAB. XL.Fig. 2.K B H F G E A I D L C
Page: 106
[48] Fig. 1.L K E D H C A G B
Page: 106
[49] Fig. 3.B Q N L M F G S H K A D C P
Page: 106
[50] Fig. 4.B G R A C D E H F
Page: 106
[51] Fig. 6.A C D M B
Page: 106
[52] Fig. 5.A E N F B L D M C G H I K O
Page: 106
[Figure 53]
Page: 108
[Figure 54]
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[55] Pag. 398.TAB. XLI.Fig. 1.S T B R K H Q C N O M A E L D
Page: 121
[56] Fig. 2.D E F B G H C A
Page: 121
[57] Fig. 3.F D E G A B C
Page: 121
[58] Fig. 4.G N B H D K A E C F
Page: 121
[59] Fig. 8K A F c C E B h H G D d
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[60] Fig. 6.C E D A F B R Q
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[61] Fig. 5.G L B H D O A E C K
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[62] Fig. 7.K F A C D B E H G
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[63] Pag. 404.TAB. XLII.Fig. 1.K F M A C D B L E N G
Page: 130
[64] Fig. 3.G R D B H F E N A X C M P Q K
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[65] Fig. 2.K A F c S C L E B T G D R d
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[66] Fig. 4.K e G P E m B D f R F S H M C A N L Q n
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[67] Fig. 5.B C R E G A F M Q D O
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[68] Fig. 6.B C H G E A M Q P K D
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[69] Fig. 7.B C E G A M P Q K H D
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[Figure 70]
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72360CHRISTIANI HUGENII
Theor. IV. Prop. IV.
Omnis circuli portio, ſemicirculo minor, minor
eſt duabus tertiis trianguli eandem cum ipſa
baſin babentis, & latera portionem contingentia.
Eſto circuli portio, ſemicirculo minor, A B C, & contin-
11TAB. XXXVIII.
Fig. 4. gant ipſam ad terminos baſis rectæ A D, C D, quæ con-
veniant in puncto D. Dico Portionem A B C minorem eſſe
duabus tertiis trianguli A D C. Ducatur enim E F quæ por-
tionem contingat in vertice B, & inſcribatur ipſi triangu-
lum maximum A B C. Quum igitur triangulum E D F ma-
jus ſit dimidio trianguli A B C , manifeſtum eſt ab 22per. 2. huj. partem abſcindi poſſe, ita ut reliquum tamen majus ſit di-
midio dicti A B C trianguli. Sit igitur hoc pacto abſciſſum
triangulum E D G. Et ducantur porro rectæ H I, K L,
quæ portiones reliquas A M B, B N C in verticibus ſuis
contingant, ipſiſque portionibus triangula maxima inſcri-
bantur. Idemque prorſus circa reliquas portiones fieri intel-
ligatur, donec tandem portiones reſiduæ ſimul minores ſint
quam duplum trianguli E D G. Erit igitur inſcripta portio-
ni figura quædam rectilinea, atque alia circumſcripta. Et
quoniam triangulum E G F majus eſt dimidio trianguli
A B C; & rurſus triangula H E I, K F L, majora quam
dimidia triangulorum A M B, B N C; idque eadem ſem-
per ratione in reliquis locum habet, ut triangula ſuper por-
tionum verticibus conſtituta, eorum quæ intra portiones i-
pſas deſcripta ſunt, majora ſint quam ſubdupla: apparet tri-
angula omnia extra portionem poſita etiam abſque triangu-
lo E G D majora ſimul eſſe quam dimidia triangulorum o-
mnium intra portionem deſcriptorum. Atqui ſegmentorum in
portione reliquorum triangulum quoque E G D majus eſt
quam ſubduplum. Ergo triangulum E D F ſimul cum reli-
quis triangulis, quæ ſunt extra portionem, majus erit dimi-
dio portionis totius A B C. Quare multo magis ſpatium

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