188 DE RESOLVTIONE 



Iam fi cx pumftis B, C, D, E, F in AG perpen- 

 diculares ducantur Ba v Ch, D /, Ez, ¥g et ex 

 punctis B, C, E, F ipfi AG parallelae quae rectac 

 D / in b 3 c, e, f occuriant , fiet 



bl zz BA*fin.B A Hzz-flfin.a 

 £<;zzBC.fin. CB£zzBC.fm.CHKzz£fui.(a + (3) 

 D^CD.fm. DC<-rzCD,fin.DlKzrffin.(a + (3 + Y) 

 DezzX)E.fm.DEezzDE.fm.DMNzz-</fm.(a + (3 + Y + £) 

 f/zzF.F. fm.EF/zz EF.fin.EOMzz -^ fin.(a + p + y+^+O 



/VzzFG. fin.FGOzz-/fm.(a + (3+Y + ^+e + £). 

 Quum igitur fit : 



Ib -\~b c \-c D ~D e -ef-fl—<y T 

 erit quoque 

 «'fm.a+^fm.(a + |3)+ffm.(a+(3 + Y)+^fi rI -( a ^P + y + ^) 

 +^fm.(a+(3+Y+^4 0+/ mi -( a +( 3r +y+^+ g ^)= ::O > 

 cui aequationi fi placet adiici poterit terminus 



g Gn. (a -+- (3 -+- y • • • -+■ K -+" $ > 

 quippe qui per fe euanefcit , exifiente 



* ■+- (3-+y-+-<$"H-e-h£+->l=: 3^° * 

 Porro habebimus quoque 

 A a zz B A. cof. B A H — a cof. a 



<z£ — BC. cof CBf — -BC.cof.CHKzz - £. cof. (a + (3) 

 hl zzCD.cof.DCtzz-CD.cof.CI Kzz #£ cr'f.(tt + (3 + y) 

 /'/ zznE.cof.DE<?zz-DE.coCDMIN!zz-</.cof.(a + (3 + Y + <^ 

 i g zz F, F. cof. 6 F / zz— E F. cof E O N zz- e, coC (a+(3 + y+*+«; 

 GgzzFG.cos. FGOzz/cof.(a + (3 + Y+£ + e + £) dcnique 

 AGzzgzzgcof.(a + p + Y + ^+e+£ + >|). 



Verum 



