How would you know if The quadrilateral is a parallelogram. ?

Question

jim_thompson5910 · Answer

If the opposite sides are parallel

anonymous · Answer

ok.. thank you @jim_thompson5910

jim_thompson5910 · Answer

Both pairs of opposite sides must be parallel

jim_thompson5910 · Answer

if you only count one pair of parallel sides, then it's a trapezoid (and not a parallelogram)

anonymous · Answer

If it has two set of parallel lines. For example if the bottom and top lines are parallel and the left and right lines are parallel then it is a parallelogram.(:

anonymous · Answer

There are three ways for you to prove it to be a parallelogram using the sides.
If both pairs of opposite sides are parallel, then it's a parallelogram.
If both pairs of opposite sides are congruent, then it's a parallelogram.
If one pair of opposite sides are both congruent and parallel.

anonymous · Answer

So it will be like this |dw:1343177221228:dw| sorry its not perfect parallelogram.. :P

anonymous · Answer

|dw:1343177318114:dw|

anonymous · Answer

That would not prove it to be a parallelogram. I mean like this.
|dw:1343177339397:dw|

anonymous · Answer

Thank You @Calcmathlete @AmauryP and @jim_thompson5910 XD

jim_thompson5910 · Answer

yw

anonymous · Answer

np :)

anonymous · Answer

No problem(: