The building blocks of geometry are the undefined terms of a point, line, plane, and space. What of the undefined terms has two dimensions?

Question

• a line
• space
• a point
• a plane

Answer 1

The undefined term that has two dimensions is a plane.

• A point has no dimensions (0 dimensions).
• A line has one dimension (length).
• A plane has two dimensions (length and width).
• Space refers to three-dimensional extent.

So, the correct answer is a plane.