the answer to that question is 1 mile
The answer to number one is 18 and the answer to number two is -1
I got B and D, sorry if my answers are wrong!!
The triangles are not similar because the smallest sides are 6/10 = 3/5, the medium sides are 8/24 = 1/3, and the longest sides are 10/26 = 5/13 and similar triangles must have the same ratio for all three sides.