Question

Which of the following best describes a basic postulate of Euclidean geometry?

A. Any two right angles are supplementary.
B. Any straight line segment can be extended indefinitely.
C. All straight line segments have a midpoint.
D. All right angles are formed from perpendicular segments.​

Answer 1

Answer: Any straight line segment can be extended indefinitely.

Explanation:

One of the postulates of the Euclidean geometry states that any straight line segment can be extended indefinitely in a straight line. So according to this postulate, the first one is correct.