### Video Transcript

Find the length of the line segment ๐ด๐ถ.

The number line drawn shows the horizontal or ๐ฅ-axis between zero and nine. The point ๐ด lies at one on the number line, the point ๐ต lies at four, and the point ๐ถ lies at six. In this question, weโre asked to find the length of ๐ด๐ถ. This means the distance from point ๐ด to point ๐ถ.

On the number line, we can see that this is the distance or difference between one and six. In order to find the difference between two numbers, we subtract them and six minus one is equal to five.

We can, therefore, say that the length of the line segment ๐ด๐ถ on the number line is five length units.