Question

which defines a line segment?
two rays with a common endpoint
a piece of a line with two endpoints
a piece of a line with one endpoint
all points equidistant from a given point

Explanation:

A line segment is a finite portion of a line that has two distinct, fixed endpoints. Let's analyze each option:

1. "two rays with a common endpoint" defines an angle, not a line segment.
2. "a piece of a line with two endpoints" matches the standard definition of a line segment.
3. "a piece of a line with one endpoint" defines a ray, not a line segment.
4. "all points equidistant from a given point" defines a circle, not a line segment.

Answer:

a piece of a line with two endpoints