CORPORVM RIGIDORVM. 259 



cof A h ccf B rt. cof. CiT+cor A r coC Cacof.B b-\-co{.Ba-\-zo^.Qa~ 



cor.A^ cof Brt^.cof.Cf + cof Af.cor.Crt.cof Bi'-!- i_cofA«', ob 

 \ cof ka -\- cof B / + cof C a — i. 



IntroJ.ucntur nunc iiic \nIor pro 



cof A b. cof. B c. co(. C fz -f- cof A c-. cof C b. cof B ^, 

 iu cxfTedionc nortr.i nd nihilum rcdi^^cnda , cuius 

 rcliqnos quoqne tcrmiros cuolutos fl;uu:muis , vt eo 

 nielius appnrer.t , quomodo fui^uli iniiiccm fc de- 

 (iriiant. Ad nihilum li^itur rcdigi (Jebcbit hacc cx- 

 prt Ifio 



i-cnf.Afl+cof.'P^cofCf-Ci..f A^cofEZ^cofCr-cofBt-cofC^+coY.B^cofC^.cof A« 

 -cof r5^-+cof Art cof Ct- -cnf Aicof C^f+cof ArcofCa cof Li^ 



-ccI.Cf-icof A<?cofB^ -cof A^cofB^^-cof A^ccfB^.col.Ct- 



— cof Ai^col Btf.cofCt; 



- T+cof A a, — cof At-cof Ctf cof hb 



Dektis autem terminis, qui mnnifcflo fe tcllunt , 

 obferucjnus ctiam pcr demonftrata efle: 



— cof A « -1- cof B b. cof Qc — cof B c. cof C ^ ~ o, 



— cof B ^ -+- c of. A ^. cof C f — cof A c. cof C ^ n o, 

 — cof Ct--f-cof Aff.cof BZ'— cof AAcof B<?z:. o. 



Dcnique ctiam 



cof A^'— cof A^cof BZ'.cofG--fcof A^.cofBi-cofCfco, 



ita vt iam perfedlc euidum fit , formulam iflara 

 propofitam nihilo acquari, 



Alia Demondratio. ^ 



16. Qunm prior demonflrmio Geometricn fit 

 et ex confidcrationc figuiae deduda , nunc aliam 



K k 2 infiiper 



y 



