Question

Which of the following statements regarding surfaces is/are true?

• A. They separate one part of a solid from the other.
• B. They are 3-D.
• C. They have no thickness.
• D. They are 1-D.

Answer 1

Answer: (A), (C)

The correct options are
A They separate one part of a solid from the other.
C They have no thickness.

A surface is a 2-D entity that separates one part of the solid from the other.
It only has length and breadth and has no thickness.