Use vectors to show that A(2,-1,1), B(3,2,-1), and C(7,0,-2) are vertices of a right triangle.
Follow Math Help Forum on Facebook and Google+
Originally Posted by jmedsy Use vectors to show that A(2,-1,1), B(3,2,-1), and C(7,0,-2) are vertices of a right triangle. what's that tell you?
ab and bc are orthogonal. there is a right angle at vertex b
View Tag Cloud