### Video Transcript

Find the length of line segment ๐ด๐ต.

We know that the distance from ๐ด to ๐ถ equals 11.1 meters. We also know that distance from ๐ต to ๐ถ is 8.2 meters. The value weโre missing is the distance from ๐ด to ๐ต. Hereโs what we know: from ๐ด to ๐ถ equals line ๐ด๐ต plus line ๐ต๐ถ. The total distance from ๐ด to ๐ถ is 11.1 meters. And that is equal to our missing value plus 8.2.

To find the missing value, we need to find the difference. We need to subtract 8.2 meters from the total distance 11.1 meters. If we start all the way on the right, we realize that we canโt subtract two from one. We borrow from our ones place, bring over a one. And now, we can say 11 minus two equals nine tenths, bring down the decimal. In the whole numbers, we now have 10 minus eight. 10 minus eight equals two. The difference is 2.9 meters.

And that tells us the length of line segment ๐ด๐ต is 2.9 meters.