Answer:
Segment
Step-by-step explanation:
Literally, segment refer to any distance between two points.
Let's assume the length of the ruler is 20inch, this means that the distance 0 inch to 12 inch is a segment of the full length of the ruler.
Another angle to look at the segment is the length of a segment can be measured because it has two end points; the end points are the point where the segment starts and the point where it ends.
So, in the question above, the end points of the segment are 0 inch and 12 inch while the length of the segment is 12inch.
This is calculated by 12 inch - 0 inch = 12 inch.
The above description can't be said of point and rays. Point is any unit position on a line while ray is a distance that starts from a point but do not have any endpoint.