: 91 
From these ratios it is easily found that 
ry, _. 2( — a? + b?+ Cc?) 
MM.za= 3A 
b a? — b? + @? 
MM) = 8A 
__ e(a? + b? — c?) 
IAT, — Pi Pia 
A 24a (S—a) 
LS 5 Sn? — 2,8 
— A ( 2 538 ) 
5 eee [8 =a* — 2.2 — 2aS(S—a) | 
= 
ff oe ; ; : A 
= S(SE2— 3a) | ab tate + be + be? — 2 abe — b? — 3 j 
IX=II,— MMa 
_ A a(—a?—b?-+ c?) 
cas 8A 
1 
= ga (84? — a S(— a? +b? +c’) | 
Bal NMS ee Sol 
= 358A | 8(S —a) (S—b) (S—c)—a Ce ee) 
=o [ab fate + b¥e + be?—2abe—b?—c?| 
VAR) b (ab + a?c + b2c + be? — 2abe — b? — 3) : 
s(sta? — Xa?) 
: = (a*b +- ac + b%e + be? — 2abe — b? — c3) = 
= 8A? :s(s¥a? — Ea’), 
