Question 107866
TO PROVE THIS IS A PARALLELOGRAM WE NEED TO PROVE THAT THE SLOPESOF THE OPOSITE SIDES ARE EQUAL.
(7-3)/2+2)=4/4=1 & (1-5)/(4-8)=-4/-4=1 THESE 2 LINES ARE PARALLEL.
(1-3)/(4+2)=-2/6=-3 & (5-7)/(8-2)=-2/6=-3 THESE 2 LINES ARE PARALLEL.