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# Title: [Johannis Wallis S. T. D. Geometriae Professoris Saviliani, in Celeberrima Academia Oxoniensi, De Algebra Tractatus; Historicus & Practicus. Anno 1685 Anglice editus; Nunc Auctus Latine. Cum variis Appendicibus; Partim prius editis Anglice, Partim nunc primum editis] Johannis Wallis S. T. D. Geometriæ Professoris Saviliani, in Celeberrima Academia Oxoniensi, De Algebra Tractatus; Historicus & Practicus. Anno 1685 Anglice editus; Nunc Auctus Latine. Cum variis Appendicibus; Partim prius editis Anglice, Partim nunc primum editis (shelfmarks Leibn. Marg. 100:1/2, Stück 2; Leibn. Marg. 100:1/2)
# Folio 280, page id 851708439:0304
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260
A L B L. B R H. Cap. L. .
Si altignetur A in ipsa dati circuli circumterencia; perinde est ad urrumvis ca-
Cum referatur (ubi inera, vel ubi extra:) Et Similiter li actisnatur A in cenro C;
aut Ti R. in circumterentia vel cenero circuli dati, vel cum A coincidat. Onippe
nulla hine evenit variario, vel in constructione rel in demonstratione, a calibus
expolitis; nili quod magnicudinum aliquae cranelcant seu in nihilum degenerent.
Sulticit igitur hos sex calus memoratos demonstrare.
DH M DHSLKAL1O.
Recta AC, F. C, (produerae) Secenc circumterentiam dacam, in HR, S P. Tum,
In primo catu,
OLFM = (∞SF F2
DVR FitCO,
 BAD = (GTIA R~ = BB BACO=) GR DRC HALC, d, 5C2
ErBO EL. AM = ∞BAD
In secundo catum
G BAD = (DTTAK
AAF.
I FM == (∞SF: T. =ck- oL CS eRL,
FxGO EBAD = ∞L F M
In certio casu,
GBAD = (= HAR
DLFM = (∞SF Td -BFC -BR
treO GBAD F GL. P.M
B AF.
a 35C3.
534
E L
dy 36C3
en 6C2
DR - B A CD.
IDR -AAC
)02C tOAC= CK.
OAL
Tre quarto catus
∞L. F. N =
GSF. Y0
=BAD = (L HIAYd-
CIB GL.RM = EBAD
2R
DAF-
A
BAC - ARC.
AF.
= ARC.