Prove that the points (2,3) ,(3,4)and (4,3) are the vertices of right angle triangle ?

Prove that the points (2,3) ,(3,4)and (4,3) are the vertices of right

1.	Prove that the points (2,3) ,(3,4)and (4,3) are the vertices of right angle triangle ?
Answer» m=4-3/3-2=1 m=3-4/4-3=-1 then m1m2=-1 1×(-1)=-1