Question

Which of the following statement is true?

• A. The floor and a wall of a room are parallel planes.
• B. The ceiling and a wall of a room are parallel planes.
• C. The floor and the ceiling of a room are parallel planes.
• D. Two adjacent walls of a room are parallel planes.

Answer 1

The correct option is C The floor and the ceiling of a room are parallel planes.

• The floor and a wall of a room are perpendicular planes.
• The ceiling and a wall of a room are perpendicular planes.
• The floor and the ceiling of a room are parallel planes.
• Two adjacent walls of a room are perpendicular planes.

The correct statement is the floor and the ceiling of a room are parallel planes.