Question

1. what kind of relationship do $overleftrightarrow{qr}$ and $overline{qu}$ have in this picture?

skew
non - coplanar
perpendicular
parallel

Explanation:

• Skew lines are non - parallel and non - intersecting lines in 3D space. Non - coplanar just means not in the same plane but doesn't fully describe the relationship. Parallel lines are in the same plane and never meet (but these are not in the same plane).
• Perpendicular lines intersect at a right angle. Here, \(\overleftrightarrow{QR}\) and \(\overline{QU}\) intersect at a right angle (as indicated by the right - angle symbol in the diagram).

Answer:

perpendicular