Which pair of rectangles is similar a) 6,8 and 3,4 b) 6,8 and 2,4 c) 6,15 and 3,8 d) 9,15 and 3,4

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?