Question

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

Explanation:

Non - coplanar lines are lines that do not lie on the same plane. 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. From the diagram and the definitions:

• Lines \(a\) and \(d\) are not parallel (they don't lie on the same plane and don't have the same direction).
• They are not perpendicular (no right - angle intersection as they are non - coplanar).
• They are not skew (skew is already wrongly marked).
• They are non - coplanar as they exist on different planes.

Answer:

non - coplanar