Given the coordinates of a parallelogram what can be verified?
1) Two sets of consecutive sides are congruent.
2) Opposite sides are parallel.
3) There exists exactly one set of opposite sides parallel.
4) All sides are congruent.

Question

Given the coordinates of a parallelogram what can be verified?
	1)	Two sets of consecutive sides are congruent.
	2)	Opposite sides are parallel.
	3)	There exists exactly one set of opposite sides parallel.
	4)	All sides are congruent.

radar · Answer

I believe choice 2) is correct, the opposite sides are parallel.  That is the definition of parallelogram.  You could determine the slope from the coordinates and verify the slopes are equal.