Question

consider the diagram. lines a and d are non - coplanar. parallel. perpendicular. skew.

Explanation:

Step1: Recall line - relationship definitions

Coplanar lines lie in the same plane. Non - coplanar lines do not. Parallel lines are coplanar and never intersect. Perpendicular lines are coplanar and intersect at a right - angle. Skew lines are non - coplanar and do not intersect.

Step2: Analyze the position of lines a and d

From the diagram, lines a and d lie in the same plane (the horizontal plane represented by \(N\)) and they do not intersect. So, they are parallel.

Answer:

parallel