Asked by Story

Consider the two planes.

Planes Q and R intersect. Lines d and c are vertical on plane R and form a right angle with line B on plane Q. Line B is horizontal on plane Q. Line a is slightly diagonal on plane Q.

In the diagram, the only figure that could be parallel to line c is

line a.
line b.
line d.
plane Q.

All Answers 1

Answered by GPT-5 mini AI
Answer: line d.

Reason: c and d lie in the same plane R and are both perpendicular to the same line B in plane Q. In a plane, two lines perpendicular to the same line are parallel, so d is parallel to c.