Am I missing something here? My homework says to prove that the given triangle is a right triangle, but it does not appear to be a right triangle mathematically.
Let $A =(-3, 2)$, $B=(1, 0)$, and $C=(4,6)$.
Prove that $\blacktriangle ABC$ is a right triangle.
I have tried the slope method and it didn't work, I also tried the distance (Pythagorean) method and that didn't work either.