Question

If FG=10 and HJ = 10. Which additional facts guarantee that FGHJ is a parallelogram? check all that apply.

Answer 1

yes, if FJ || GH, and also if FG || HJ, since a parallelogram has two pairs of parallel sides.

now, we know FG = HJ = 10, but if it's a parallelogram, then the other two sides must also have the same length, so chances are FJ = GH = 15.