SOLUTION: Im stuck on a proof. there is 3 spots 1 and 2 and 3 and no 0 for given. Problem : Prove that ABCD is a parallelogram. A = (-1, 10), B = (6,8), C = (3,-2) D = (-4,0)

Question 433802: Im stuck on a proof. there is 3 spots 1 and 2 and 3 and no 0 for given. Problem : Prove that ABCD is a parallelogram. A = (-1, 10), B = (6,8), C = (3,-2) D = (-4,0)
Answer by shree840(260) (Show Source): You can put this solution on YOUR website!
A (-1,10)
b (6,8)
c (3,-2)
d(-4,0)
we need to prove ab is parallel to cd
ad is parallel to bc
m1(ab)=(8-10)/(6--1)=-2/7
m2(cd)=(0--2)/(-4-3)=2/-7=-2/7
m3(ad)=(0-10)/(-4--1)=-10/-3=10/3
m4(bc)=(-2-8)/(3-6)=-10/-3=10/3
Hence it is a parallelogram ANS

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