( 1055 ) 
Ackoque fignum ipfius mutandum eft, quatido ? ^ 
cadic ad alteras partes Ordinatse primse, nt 
Cafus Secundus, 
Sit jam A q Ordinata in medio omnium ; pone 
H -}- drc. 6>c a C4, £3, ^ d= /, &c. 
id eft, fifmt A6z=a, Aq=::/3, J8 = y, Ap==/^, 
= 3t> ^3 = A, Az ■=.fA, A — V, cjrc. Pone ^=ra— .jc, 
/3 — 2a-|-2}t — A, 4/3-f 
-f 1 4/3 — 1 4 a *f 1 4»t — 1 4 A -1- 6//^ ^ y, 
+ ^ = /3 — 4a-}- 6/45 — 
/3— 56 «-}-70/45— 56>c4-i8A^8At-fy, ^c. 
Ec dicatur A qP, z, turn eric 
PX=A; + ^l^ + 
+ 5;5_r 
f 
3*4* 
3£i+5? _ 
I . 2 
X 
+ 
3.4 y -6 
+ I 4 9 
I *2 
X 
I .2 
X 
3 .4 
X 
X 
7i8 
+ 
5,6 7 , 8 ^ , 10 
Cafus Tertius.- 
Sint jam Aq, Ordinatse duas in medio omnium: 
A4 -f- -45 _ 
Pone A 
g = gj±l^, C=:^2+/\ D 
z z 
10 A 
G+6z 
