Tam vero quoqne habetur: 



cof. A C E — cof. A E fln. E A C = coC {s~a) Cin. l A 

 cof: (/ - a) y ji'' . .^^-c)r,n.(s- i,) 



itidem per §.12, 



Tab. Iir. f. 2.6, Theorcma XIX. Si trianguh A B Cy cir' 



^^S>- 4- ciiJus ftt circumfcriptus et alius ipfi infcriptus , tnmque di- 



Jlantia Poli prioris circuli a pttn&o A indigitetur per r, <//- 



jlantia vero Poli pojlerioris circuli ah arcu AB per r*, erit 



1 fin,| a fin.,' b fin.i c 

 tang. r . tang. r — ; ~ , 



lin, s 



dejignatis nimirum lateribus trianguli refpeSliue per a , b , c 

 €t pofito s zrz 5 (a -h b 4- c). 



Dmonflr» Per Theor. XllT. efl 



c fin.^tf fin.^^ fin.*r 



y fin. J fin. (j—a") i\ii..{s—b) fin. {s~c) * . 

 ct per Theorema XVL 



tang. r' — y iiMiir^Jri^dr^ , hinc 



, i:fin. j<2 fin.;^ fin.*^: 



lang. r tang. r zz '— 



iin. j 



$. 27. Theorema XX. LW^ct p<7////j ejl 



, — cof. S 

 tang. r tang. f' =: -— __- — --—, 



2 cof. - A col. i D cof. i Lr 

 ieftgnatis nimirum angulis refpeUive per A, Bi C (t poftt* 



S = UA 4- B -1- C> 



