Question 433800
Isosceles means AB=AC
A(11,2) B(23,1) C (2,10)
AB= sq root((23-11)^2 + (1-2)^2
   = sq root (145))'=
Ac = sq root((11-2)^2+(2-10)^2
   = sq root ((81+64)
   = sq root (145)
AB=AC so it is an isosceles triangle  ANS