1. Select all the triangles that can be rotated to match up with Triangle 1. Triangle 1 A B D C С​

15 points ! ~ see if you know the answer to both you!

Add the fractions, and simply the result to lowest terms. 2/3 + 2/7= ?

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?