>>> res = []
>>> for a in range(1,11):
... for b in range(1, 11):
... for c in range(1, 11):
... s = [a,b,c]
... s.sort()
... if s[0]+s[1]==s[2]:
... res.append(s)
...
>>> res
[[1, 1, 2], [1, 1, 2], [1, 2, 3], [1, 2, 3], [1, 3, 4], [1, 3, 4], [1, 4, 5], [1
, 4, 5], [1, 5, 6], [1, 5, 6], [1, 6, 7], [1, 6, 7], [1, 7, 8], [1, 7, 8], [1, 8
, 9], [1, 8, 9], [1, 9, 10], [1, 9, 10], [1, 1, 2], [1, 2, 3], [2, 2, 4], [1, 2,
3], [2, 3, 5], [2, 2, 4], [2, 4, 6], [2, 3, 5], [2, 5, 7], [2, 4, 6], [2, 6, 8]
, [2, 5, 7], [2, 7, 9], [2, 6, 8], [2, 8, 10], [2, 7, 9], [2, 8, 10], [1, 2, 3],
[1, 3, 4], [1, 2, 3], [2, 3, 5], [3, 3, 6], [1, 3, 4], [3, 4, 7], [2, 3, 5], [3
, 5, 8], [3, 3, 6], [3, 6, 9], [3, 4, 7], [3, 7, 10], [3, 5, 8], [3, 6, 9], [3,
7, 10], [1, 3, 4], [1, 4, 5], [2, 2, 4], [2, 4, 6], [1, 3, 4], [3, 4, 7], [4, 4,
8], [1, 4, 5], [4, 5, 9], [2, 4, 6], [4, 6, 10], [3, 4, 7], [4, 4, 8], [4, 5, 9
], [4, 6, 10], [1, 4, 5], [1, 5, 6], [2, 3, 5], [2, 5, 7], [2, 3, 5], [3, 5, 8],
[1, 4, 5], [4, 5, 9], [5, 5, 10], [1, 5, 6], [2, 5, 7], [3, 5, 8], [4, 5, 9], [
5, 5, 10], [1, 5, 6], [1, 6, 7], [2, 4, 6], [2, 6, 8], [3, 3, 6], [3, 6, 9], [2,
4, 6], [4, 6, 10], [1, 5, 6], [1, 6, 7], [2, 6, 8], [3, 6, 9], [4, 6, 10], [1,
6, 7], [1, 7, 8], [2, 5, 7], [2, 7, 9], [3, 4, 7], [3, 7, 10], [3, 4, 7], [2, 5,
7], [1, 6, 7], [1, 7, 8], [2, 7, 9], [3, 7, 10], [1, 7, 8], [1, 8, 9], [2, 6, 8
], [2, 8, 10], [3, 5, 8], [4, 4, 8], [3, 5, 8], [2, 6, 8], [1, 7, 8], [1, 8, 9],
[2, 8, 10], [1, 8, 9], [1, 9, 10], [2, 7, 9], [3, 6, 9], [4, 5, 9], [4, 5, 9],
[3, 6, 9], [2, 7, 9], [1, 8, 9], [1, 9, 10], [1, 9, 10], [2, 8, 10], [3, 7, 10],
[4, 6, 10], [5, 5, 10], [4, 6, 10], [3, 7, 10], [2, 8, 10], [1, 9, 10]]
>>> len(res)
135