Answer:
The triangle are similar and the missing line is 16.5
Explanation:
The reason is because the scale factor is 2. You can find this out by multiply 8×2=16 and 9×2=18. With this in mind you divided 11 by 2 to get 5.5 for LD. Finally, adding 11+5.5 you will get 16.5.
Hope this helped