•07 r?-j«_ Voctntur Jatfera tfmng-uli -d-iti 



fitqiie area haius trianguli rf: A,'ita Tt fit 



i6 /^ i^~2. a abb -\-'z'a a c c-\- 2. b b c c ~ a^ ~P —'c*'', 

 fiue 



I 6AAr=i{a-^b-{-c) {a -{- b - c) (a -{- c - b) {b\-'c-'a)\ 

 tum fingula latera trianguli bifecentur •' in puiliniis a,b ti c 

 et redae Aa, B ^, C ^, quae fe mutuo in centro grauita-j 

 tis trianguli O interfecabunt, erunt tangentcs curuae tri- 

 angularis in fuis cufpidibus A, B et G. lam, fumta re- 

 dta A fl pro axe, ponatur anguli BOrt cotangens — (3 et 

 anguli CO« cotangens — — y, atque ex formulis ante 

 inuentis , fcribendo loco litterarum A , B et C has minu- 

 fculas ^ , c tt fl, colligitur ■ —• 



o 5 h h — ga — ec -j. __ a a _j_ 6 &_— w<f5 "J" 



P — TTE. cc y -j^ , 



ita vt fit 



:.of -^ ' P^-Y — — Ta— • 



H°. Nunc capiatur 

 n — fe 



Tnde fiet 



Ji .<* ■ « — ((SiS-p-y^-Kv"^ - (P -H •v^Th^ » "' '. ' 



'■ ■ tum vero ' : ' -' '""^^^''■^! '-' ■ 



..>,. ,, — ^ „ _ TT — — fefP3— (^v-f-A^r^^^ ^fg-^vVf-^tiP^ 



vbi f et M funt coordinatae pro curua triangulari quaefita. 



Sumto enim eius pundo quocunque U, indequc demiffo 



'^ ■• la 



