One side of a parallelogram has endpoints (3, 3) and (1, 7).

What are the endpoints for the side opposite?

(8, 1) and (6, 7)
(6, 1) and (2, 3)
(6, 1) and (8, 5)
(8, 1) and (6, 5)

2 answers

length of that side = sqrt( (3-1)^2 + sqrt(7-3)^22 )
= sqrt 20
other side must also be sqrt 20

only one works :)
whoops , slopes must be the same
4/-2 = -2
so
a. 6/-2 no
b. 2/-4 no
c. 4/2 no
d. 4/-2 yes