Question

Which of the following is/are the undefined terms put forth by Euclid?

• A. Point
• B. Parallel lines
• C. Line
• D. Plane

Answer 1

Answer: (A), (C), (D)

The correct options are
A Point
C Line
D Plane

In geometry, we take a point, a line and a plane (in Euclid’s words a plane surface) as undefined terms. We can represent them intuitively, or explain them with the help of ‘physical models.’