Question

If a ∥ b and b ⊥ y, then _____a ∥ y.a ⊥ y.x ∥ y.x ⊥ a.

Answer 1

If a || b, that means that the angle between any line y and b must be exactly the same angle between y and a. Therefore, if b ⊥ y, we can conclude that a ⊥ y.