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

Table of figures

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[21] Fig. 5.B E D A C G F
Page: 36
[Figure 22]
Page: 49
[23] Pag. 340.TAB. XXXVII.Fig. 1.C G H F E DH A X Q Y T N V B G
Page: 51
[24] Fig. 3.γ A F D X B P N V E Q C
Page: 51
[25] Fig. 2.K C Δ R Θ Z O Γ D I
Page: 51
[26] Fig. 4.A B D C Π Φ N E S P F
Page: 51
[27] Fig. 2.M E Ψ Λ Φ S Ξ Π Ρ Σ Ω F L
Page: 51
[28] Fig. 5.K B Δ E Z A C R O D Θ Γ I
Page: 51
[Figure 29]
Page: 55
[Figure 30]
Page: 65
[Figure 31]
Page: 69
[32] Pag. 366.TAB.XXXVIII.Fig. 1.B E F G A D C
Page: 80
[33] Fig. 2.E F G B A C
Page: 80
[34] Fig. 3.B E D C A F
Page: 80
[35] Fig. 4.D G E F I B K M N H L A C
Page: 80
[36] Fig. 5.HD A B C
Page: 80
[37] Fig. 6.E D C B F G A
Page: 80
[38] Fig. 8.D E G B A F C
Page: 80
[39] Fig. 7.N G H I KE L M A P C O F B D
Page: 80
[40] Pag. 376.TAB. XXXIXFig. 1.E K C B A L H G D F
Page: 93
[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
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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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