# Thread: Triangle on coordinates problem

1. ## Triangle on coordinates problem

I have to show that the points (7,-3,6), (11,-5,3), and (10, -7, 8) are the vertices of an isosceles triangle for linear algebra homework. How do approach this?

2. Find the distance between the point

$\sqrt{(x-x')^2+(y-y")^2+(z-z')^2}$