Question

examining lines in three dimensions. are the lines in the diagram perpendicular, parallel, skew, or none of these? l and m. l and n. m and n. perpendicular < skew <

Explanation:

Step1: Recall line - relationship definitions

Perpendicular lines form a 90 - degree angle. Parallel lines are in the same plane and never intersect. Skew lines are non - coplanar and do not intersect.

Step2: Analyze lines l and m

Lines l and m are in the same plane (plane A) and they intersect at a right - angle (as indicated by the small square at the intersection).

Answer:

perpendicular