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# Title: Francisci Dulaurens Specimina Mathematica Duobus Libris Comprehensa (shelfmark Leibn. Marg. 134)
# Folio 56, page id 1066520976:0076
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5b SPECTMLHUM MLLALMASLCOAAM
00n.an
Si vero dectmerrica contemplances sumamus, verbi
ratia aum quodris BCZ, vel BCA, et ab uno ex ejus
LIS dCMIEEREUE Tam P.
Duoniam 10 cadence intra sum L0D in Pa Agurarecta L
BiseCaTUT iN ParEES AXF, ACE Z 2 -+ A2HIZZ A + P2.
ue conclusum est propositione 62, e urrimque addico
= P2 habebitur.
+72(+ A 2 -+ P2TI) + B. 2FI2Z A(-+ F2- + P2TI)-+ C2
undenora sursicxequario +Z2 + B2TI. 1 2Z A +C2.
2 C adeHTC exETa LUM IO P, ucin 2 Figura, quoniam
recta Z, bilecatur in partes A, e F Aer Per sam. propo-
sicionem Z2TI - F A -F 2 AF- + R 3, e uerimque addico
+ P= OriEur (Z 2-F PZ HI) -+ B~HI -L A2 -L2AF (LF. 3
+P=T1) - + C2 unde nora sursit equario-t B:II. = F C3
+A=- + 2 AF.
DUOD SIC ENUNCTATUR.
IN 1 CASI.
In Alis acuriangulis D lacerum Lum acurum conti:
mentium aequantur 10 laceris lum acurum (ubcendentis;
plusduplicer sub uno laterum, circa Lum acurum exi-
stencium, quod à Lo bisecatur, ee sub legmentoprope Lum
acutum adjacence.
IN 20 C ASI.
In obculiangulis lis cum laceris Lum obculum subren:
deneis aequatur summx. gorum a lareribus cum obcusum
continentibus, plus duplice e Tubuno larerum circa Lum
obculum existentium, in quodnempe cadit ium ex sub
ejusdem laceris concinuati legmenco, incer obculum cum
C LIM INCETCCPIO.
Au