Question

In a plane, line N is parallel to line O, line O is parallel to P, and line L is perpendicular to line N. Which must be true? N. Which must be true?

Answer 1

The correct answer is:

Line L must be perpendicular to both line O and line P as well.

Explanation:

Since N, O and P are all parallel, any line that intersects N will intersect O and P at the same angle.  Since L is perpendicular to N, intersecting at a right angle, this means it must be perpendicular to O and P also.