Answer:

Explanation:
Hello,
We need to sum all sides, we know all of them except two sides that we can guess as this is
for the horizontal one 11 - 2 - 2 - 2 = 11 - 6 = 5
for the vertical one 5 - 3 = 2
so in total it comes
11 + 5 + 2 + 2 + 2 + 2 + 2 + 2 + 5 + 3 =16 + 12 + 8 = 16 + 20 = 36
hope this helps