It is a line segment
A line segment's length is restricted by its endpoints
...segment
A ray
A yardstick is a linear measuring tool, typically three feet long, used for measuring length or distance. In geometric terms, it can be referred to as a "line segment" since it has two endpoints and a defined length. Additionally, it can be considered a specific instance of a "measurement tool" in geometry.
The geometric term for the edge of a desk is a "line segment." In geometry, a line segment is a part of a line that is bounded by two distinct endpoints. In this case, the edge of the desk can be represented as a line segment where the two endpoints are where the edge begins and ends.
A defined line segment has endpoints.
segment
A line segment's length is restricted by its endpoints
...segment
A ray
The geometric term for the edge of a desk is a "line segment." In geometry, a line segment is a part of a line that is bounded by two distinct endpoints. In this case, the edge of the desk can be represented as a line segment where the two endpoints are where the edge begins and ends.
A triangle
Right angle and rectangle are geometric terms.
An arc is a part of a circle that is defined by its endpoints. It is a segment of the circumference of the circle.
I am going to say a line segment. No segments is a line, and one endpoint is a ray.
A chord or its radius
curve