Which of the following characteristics does a rhombus possess that proves the figure to be classified as a quadrilateral and a parallelogram?
select all that apply.

1. two pairs of opposite parallel sides
2. two pairs of opposite congruent angles
3. consecutive sides are perpendicular
4. perpendicular diagonals
5. four sided figure
6. intersecting diagonals

1- what do you think the product of a nonzero rational number and an irrational number is? is it rational or irrational? make use of variables, the closure property of integers, and possibly a proof by contradiction to prove your hypothesis.2- why do we have to specify that the rational number must be nonzero when we determine what the product of a nonzero rational number and an irrational number is? if the rational number were 0, would it give us the same result we found in the first question?