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# Title: Qua Continentur De Angulo Contactus & Semicirculi, Disquisitio Geometrica. De Sectionibus Conicis Tractatus. Arithmetica Infinitorum: sive de Curvilineorum quadraturâ, &c. Eclipseos Solaris Observatio (shelfmark Leibn. Marg. 84:2)
# Folio 74, page id 824573315:0286
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Arithmetica Insinitorum.
PrOP, IOL.
crammi ADE, tertiae proportionales;) erunt rectae illa
(DB, de, ∞c. ) in reciproca rationis Diametrorum (Dd
da, ec.) ratione criplicata (scil. ut dac, OAC,  c.)
Et Paralleloeramma inscripta ADB, AdB, e c.) in reci
procae rationis diametrorum ratione duplicata. (sive et
dit 9. D A9, C.)
una amAAA Qm SANRARAENAAMMMRARMARARARMARMARRRAnAna
onac
nananna
uncinomanannai
aninanavanum
a
a
e
EK enim (ex constructione) DB. dB:: dB. DB:: d AC.
DAC. EC propterea etiam dB -D 2CDB. ErgO Paralle
aAC
loeramma AD B. A d B: : D A a D B. d A a dB =
dac
DB = OACDB:3 a Ag+DA = DB, DAC~
dAc
DB:: d A9. D A9. Ouod crac demontrandum.
SCHOLZOM.
Acque eodem modo de aliis ejusmodi Rouris planis ex qua-
libet rectarum serie reciproca conslatis judicandum erit; ut se de
Parallelozammis (lire rectangulis sire obliguangulis, prout
licus fgurx pottulac,) ipsis inscripris.
Ouod ad aream aucem axtinet ictarum Rgurarum ex Ceriebus
reciprocis constantium; quaerenda est illa eodem fere modo
quo supra in Cericbus directis. Ubi aurem series dicectae indices
habene 1, 2, 3, Rec. uc quae supra seriem sEgnalium eoc gradi-
bus ascendune; habebune hae quidem (illis recipeoca) EuOS
indices concrarios negaciros n 1, = 2, L 3, _C. TANGUAM EOE
eradibus intra seriem Agualium descendences. Piouc aurem
illae ab ocipbra vel Hihilo continuo creleune, hae contra ab
co Intinico concinue di. scunc; sacqueut illie terminus maxia
MUs