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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 86, page id 824573315:0170
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De
De Sectionibus conicis.
PROP. 36.
Tum (quia, proxter Fyperbolam, quadraca Ordinarim. ap.
plicacarum Cune rectangulis Atla proportionalia, uc modo o
dentum c) eric HANHa. DA N Da:: Hag. VOG. hOC C,
autu. 1at  t a = 1a = 2d0:: B2 1dF a + a +1a + 3d0
iutu
FC CPr oPcex similia eriangula) HF. Fa:: DF. DT. hoc CA
S. B :: ft a.
T9
tum 
h-- DT. ejusq. quadratum
+a2 = 2fa pa
Tum (DFOPEEEEAnSCnCeM) DTg = DOq Cnempe equa
lia hD H coincidanc; vel, s secus, illud majus; ) hOC CR,
N a  + 2(a
B2 = Iut a= +a + 1a + 2da,
do per 1atd2
q
1at s2 a2 +s2  + 2
tata2
h._ (ucrinq; mulcipliea.
FICIda F- = a2 + 2fida, + 2f4 a ~ f2 a2 + 5= 12 2 2f da. F. (divi
dendo per t a) eriit, ia +d a + 3fid F2ju = = + s= a +s2, + 2 f d.
Denigi, PonendoD H idem esse punctum Cue cranclcat
quancicao