Answer:
None, they are not similar.
You can tell by trying to match ratios with others.
55:42:36
(I put them least to greatest order because triangles cannot really like change only one sides' value, so it makes it visually easier to comprehend.
8:7:5
I can't see any possible way to relate these two ratios together.
The 5 cannot go into 36 anyhow, and like the 8 and 55. The 7 can be multiplied by 6 to get 42, but 5 and 8 cannot reach their own numbers.
Explanation:
I shall accept every question from your profile >:)