Which describes a part of a line that has one endpoint and continues without end in one direction?

Which describes a part of a line that has one endpoint and continues without end in one direction?

• A. Line
• B. Segment
• C. Ray
• D. Circle

Answer: (C)

Understanding how a line, a segment, and a ray differ by endpoints and extent helps here. A ray fits the description because it has one starting point (an endpoint) and continues indefinitely in one direction. That single endpoint marks its origin, while the rest goes off without bound. In contrast, a line has no endpoints and stretches forever in both directions; a segment has two endpoints and a finite length; a circle is a closed curve with no endpoints. So the described part is a ray.

Understanding how a line, a segment, and a ray differ by endpoints and extent helps here. A ray fits the description because it has one starting point (an endpoint) and continues indefinitely in one direction. That single endpoint marks its origin, while the rest goes off without bound.

In contrast, a line has no endpoints and stretches forever in both directions; a segment has two endpoints and a finite length; a circle is a closed curve with no endpoints. So the described part is a ray.