Question 397114
The triangle can't be isosceles...this is because the distance between each pair of points is different:


(3,5), (7,3)
{{{d = sqrt((3-7)^2 + (5-3)^2) = sqrt(20)}}}


(3,5), (-5,4)
{{{d = sqrt((3-(-5))^2 + (5-4)^2) = sqrt(82)}}}


(7,3), (-5,4)
{{{d = sqrt((7-(-5))^2 + (3-4)^2) = sqrt(145)}}}