lari bafi iiffiftens, & feeetur plano quolibet i EM. Ponatur feftio alia KiL parallela bafi & ' occurrens priori fedliotti in Hi, intelib 'gaturquehfe&io tertia priores duas in EH , KL perpendieuliriterhblfecaris atque etiam conum in triangulo ABC. Jam produco EH donec ipfi AK occurrat in D , du&ifque EF ac DG refla? KL parallelis & occurrentibus fefliohi triangulari in F , G, catur EF 37 a, DG *7 b, ED 37 c, EH 37 x; & Hi 37 y> °b triangulorum EHL, EDG fimilitudinemy -erit ED ( c ) : DG bx
( b ) Z EH ( x) : HL ^ ---------. Simili mo-
b
do ob triangulorum DEF, DHK fimilitu-dinem erit DE (c)>EF (a) 37 DH ( c
_ x } ( Fig. ^7. ) vel ( c d- x ,) ( Fig. ac d-4 ax
58. ) : HK 2  -------—- • Tandem cum
feflio KiL .parallela baff fit circulus., ut pdtet ex genefi ipfius coni , erit _ x	abx
HK X HL Hi* , hoc? eft , — abxx	. c
+- —— 37 ,y2/ Ar fi ponatur feflionem
ac
ita fe habere ut ED non occurrat lateri AK, fed ipfi parallela , tunc erit HK
^7 EF 37 a , ideoque HK X HL 37
abx
hoc eft , ■ — 77 y2 * Probe notanda efF cur«