Select the correct answer. Which expression is equivalent to the given expression? Assume the denominator does not equal zero

Select the correct answer from each drop down menu

Two lines that do not intersect are skew. always sometimes or never

Which must be true in order for the relationship △zyv ~ △xwv to be correct? zy ∥ wx ∠z ≅ ∠y and ∠w ≅ ∠x zv ≅ vy and wv ≅ vx ∠z ≅ ∠x and ∠w ≅ ∠y