CORPORVM RIG DOaVM. 2ji 



quemur 



cof. M N — cof A M cof. A N -f- fin. A M. fin. A \<l 

 (cof. M A C coi: N A C + fiii M A C. fiii N A C). 



Eft vero, fiii. AMcof.MAC— coCMP.cof.PC— cof.MC 

 fin. A N cof. N AC— coC NQ. cof.QC— cof. NC 

 fin AM.fin.MACz=col.MP.<o(.BP- cofBM 

 fin. AN. fin. N AC— co(. NQ_.col.BQ= C( l.BN Tab. iir. 



cx quo euident(.r coUigitiir , Fig. 2. 



co(. M Nzzcof. A M.cof. A N+col.BMcof. BN +co{.CMcof.CN. 



Secunc/o fi fit M A N zz M A C -f- N A C erit , 



cor.MAN— cof.MACcof.NAC-fin.MACfin NAChinc 



cof. Al N — cof AM cof. AN-Km. AM.fin. ANfco(.M aC. 



cof. N AC-fin. M A C fin. N A Cj, 

 tum vcro crir 



fin. A Al. cof. M A C =: cof M P cof C P — cof. C M 

 fin. A N co(. N A C zr: col. N Qcof C (^— cof. C N 

 fin. A M. fin. [\1 A C = co(. M Pco( B P ~ cof. B .M 

 fin A N. fin. N A C^- cof. N Q.cof. BQz:-cof BN 



cx quo etiam nunc fit 



cof. M N — cof A M.cof. A N H-cof.BM cof BN-f-cof.CM cofCN. 



Theorema i. 



3. Si f^lhnera circa cehtrum fuum fixnm vtcwi- 

 que conuer.atuy , ^ot puncta A, B, C quadrantibus in- 

 ter fe di/iantia perueniant in pun6ta a, b, c, tivn pun- 

 6fum quodcunque Z ita transierctur in z, vt fit 

 cofjzArzco^.ZAcorAfl+cofZBcof. A^+cofZCcof.A^ 

 cof c B - cof Z A cof B a f cof ZB cof. Bi+cof ZC. co{ hc 

 cof 2 C= cof Z A cof C<z+col.ZBcnf CZ^+cof.ZCcof Cf. 

 Tom.XX.Nou.Coinm. Hh Demon- 



