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## What is a ray and line segment?

A line segment has two endpoints. It contains these endpoints and all the points of the line between them. A ray is a part of a line that has one endpoint and goes on infinitely in only one direction. You cannot measure the length of a ray.

## How is line different from a ray?

Student: So, what is the difference between a line and a ray? Mentor: A line goes on to infinity in both directions, but a ray stops on one end. If you cut a line in half, you make two rays.

What do you call line segment AB?

In the figure above, a line segment AB has two end points A and B. It starts from point A and ends at point B. One and only one line-segment can be between two given points A and B. This line-segment is called AB. It may also be called BA.

What is another name for a line segment?

Examples of line segments include the sides of a triangle or square. More generally, when the end points are both vertices of a polygon, the line segment is either an edge if they are adjacent vertices, or otherwise a diagonal. When the end points both lie on a curve such as a circle, a line segment is called a chord.

### What is a ray XY?

A ray is named by its endpoint and another point on the ray. The top drawing is the Ray XY. Ray XY is NOT the same as Ray YX since their endpoints are not the same and they extend in different directions.

### How do you write a line segment?

In geometry, you will write a line segment using the letters for each of the end points and a line over the top of the letters. For example, if your end points were A and B, then you would write your line segment AB with a line over the top.

Is ray longer than half line?

ray – the union of a half-line and its origin. It extends infinitely in one direction from a point. *Note: The difference between half-lines and rays is that rays contain the origin and half-lines do not.

Is AB the same as BA?

Line BA is the same as line AB. Both pass through the same two points A and B. A line-segment may be also a part of ray. In the figure below, a line segment AB has two end points A and B.