A triangle has vertices at A(3,4),B(-3,2),C(-1,-4). Is the triangle a right triangle? Explain.
How do I find the answer? I am not sure what equation to use.
What's the answer
I think I am supposed to find the slopes of all three lines first, but I am still not completely sure.
sure, why not
slope AB = -2/-6 = 1/3
slope AC = -8/-4 = 2
slope BC = -6/2 = - 3
oh!
AB is perpendicular to BC !
slope AB = -1/slope BC