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# Title: [Problema Austriacum Plus Ultra Quadratura Circuli] Problema Avstriacvm Plvs Vltra Qvadratvra Circvli (shelfmark Leibn. Marg. 230, Stück 1)
# Folio 371, page id 1815201908:0428
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Ca
P A R ABOLL.
Corollarium.
lnc pacee qualcumque duas contingences parabolam, convenire in aliquopun-
Ao excca lectionem: pacec exiam demonstraris.
PROPOSITIO XXI
Tontingences actx per extrema ordinarim applicacae cum ciuldem
diamerro, in rno codemque conveniune puncto.
Demonstratio.
Icad ABC parabolx diamerrum BD, ordina-
eim applicata A C, AICO CONEIHGENLES POT A ex C
ductas, diametro BD occurrere in vnocodemque
puncto D. demonstracio patee, cum pars diamerri
a sectione de concingence incercepca aequalis sE
porrioni à sectione e ordinacim, applicaca inter-
cePEX. isitur concinseneS, de C. Quod crar demon.
prandum.
PROPOSTEIO XXI
DErdacum punctum in perimetro parabolae diametrum ducere.
Constructio ex demonstratio.
Ie in ABC perimetro astienacum
punctum B, ex quo oporrcat diame.
erum poncre; ductâ quavis secance
B E, exhibeaeut illius diameter a HIF,
cuiper B xequidictans ponatur BD: P2-
ret illam bsectionis esse diamerrum: à
daro isirur puncto, e c. Quoderacta
ciendum.
rollari
rum oporrearponiere. Constructio ex demonstratio pacec ex plima propositione.
a3. trinr.
6
huius
ihdem omnino praxi vremur, A et dato, exera velinera leaionem punato D, dlame:
OPOsITIO XXII
Aca parabola
attet racllte.
Cosmuro es libiibi
IcA BC Pataboracuts
PatalleeenAC quatu
stratio.
axem oporcear exhibe.
res Ponantur dua guaenis
cxoearus Maels
BF: da gdaM ex V a C
normaliret dUCANEUIEPC
LMi accclalsae Mllatcllui
cuta L. C bilarta clllla