# What is ray

## Drawing a straight line, segment, ray - an introduction to geometry

### The distance Aroute is basically a straight line, just like a straight line. The difference, however, is that they are oneStart point and an end pointowns. The length of a route can thus be determined. These start and end points are each named with a capital letter. The route is named after the start and end point. For example, the route \$ \ overline {AB} \$ is shown here.

### Construct a route

If we have a route want to draw, we must first draw two points on the sheet and then name them with capital letters. In the second step, we then connect the two points. Watch out! It must not be drawn beyond the points!

### Ray or half line A beam will also be Half straight called. This is because it is infinite on one side, like a straight line. The other side is limited by a point.

### Construct a ray

First we draw a point. Then we put the ruler on the point and draw a line.

Why do we need the distinction between straight line, segment and ray? Let's look at the application of lines, segments, and rays:

### Use of straight lines, lines and rays

Linear functions are for example Straight lines. They are infinitely long and therefore have no start or end point. They are either defined by two points or by the slope and the y-axis intercept.

With stretch we work a lot in the field of geometry. All lengths that we can determine are distances. For example, if we are to determine the area of ​​a rectangle, we have given two lines. 