Question

1. in the rectangular prism below bc and cf are perpendicular because... they intersect a 90° angle and are not on the same plane. they do not intersect a 90° angle and are not on the same plane. they intersect at a 90° angle and are on the same plane. they do not intersect a 90° angle and are on the same plane.

Explanation:

Perpendicular lines intersect at a 90 - degree angle. In a rectangular prism, adjacent edges like BC and CF are on the same face (a plane) and meet at a 90 - degree angle.

Answer:

They intersect at a 90° angle and are on the same plane.