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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)
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Problema primum vuleare est; sed non uu adus Resolvendi. Secundum no-
ap. L.AA.
vum est, tum ipsum Problema, tum es Resolutio; quam duobus modis absolvi
ut ostendam, Problemata multa posse, per hanc methodum, variis modis persici
Tertium subjunni, jam primitus exeositatum postquam praecedentia descripta
fuerant.
Tuus ad ofticia,
Thomas Strode.
CA puncto D, ducancur dux rectae, ut
ec DF DV, qua parallela sint lateribus AC
ccCB per qua Transire praesenciatur recta
ec dividens OD. Dividatur CB in C, in ra
aetione e ad l; ut sIt R. L:: CB. C C. Tun
E DaLIE FG. FF huic parallela duCatT AF
a Fiatque F. II = 4 CV. Centris C ec II,
ae distantia CF, ducantur arcus duo se mu-
cino intertecantes in WV. Fiacque L N
WV. Bisccetur CN in O. Ec jungatur
cOD. Tum eric, criangulum ACB, 20
c P CO triansulum, ut R ad l; PTOUL eraL
II. Friangillum ABC in duo membra
a requalia diriere, recta qua parallela sII
ec lateri BC; IId. tamen ut ad criangulum
cs incerius ANF, reliquatur communis adi-
cc cuS, lateri AB adjacens, quale est PL BF
ac paralleloorammum (cujus dari supponi-
cc Eue BL latuS;) Licque ANF triangulum
ae xequale crapezio CLPH.
Bisccetur CB in D; et BI. in R. Fiac-
ae que DMT =- BL. Centrisque M e D, di-
aestantia DR, ducantur areus duo le mutro
a incersecantes in O. Fiat C F = CO; 8
e GF. parallela rectae C A; _ NF ipsI BC; e PL ipsi BA
Paraltela. Erirque criangulum ANE aequale EaperiO CL PN; PTOut erat
ae Vel sic alias. Diseca F. D in R. FL COV
a einnetur DC ad A; UE BIE C A = ZCD
a Cenris A et D, distantia CR, ducancur
ac greus duo se mutuo incerfecantes in L.
cc Fiiac CT= C F: _ TO = L, R. DUCALIE
aOMI parallela recta C P: et MN rectae
DC: _ LP rectae FD Parallela. FxItque
ec Triangulum N F M aquale Fraperio
NCCF PHI; Uc crat imperatum.
Solruntur haec Problemata ODe Pri
anguli Floscelis. Nam, in Fisura prima,
Foret CWHI TIolceles Priansulum Si du
cerentur lacera CW, FIN. Ex similicer.
in secunda, NOD: ec in tertia, AFD
ac Inguirenda igitur erir Proprietas II0-
cc fcctio Friangul. Ouae haec clt. Si recta d
ec Vertice Balin diricat in duo segmenta
ae inaequalia; puca, uc BH. dividit AC balin
cc in F: Tum rectae BF. quadratum, una
ec cum segmentorum rectangulo AFC; X
eC quantur quadrato rectae BA. (F (tO a BH,
=AE, n FC, b= BA: erit ad  I. bb.)
A L C F B R A.
transeunte, ia diridere, ul u  Patione l ad 1.
+T. Friangulum ABC, recta OD, per datum extra criangulum D punctum
CC IMDCTaTM.
se imperatum.