Question

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