Question

determine the triangle's whose vertices are given is isosceles (10,-18),(3,6)& (-5,2)

Answer 1

root of;(x1-x2)^2+(y1-y2)^2
         =(10-3)^2+(-18-6)^2
         =49+576
         =625
         =25 sq. units
 root of;(10-(-5)^2+(-18-2)^2
           =225+400
           =625
           =25 sq. units
since two sides are equal the triangle is isosceles.