Is this a triangle?

Implement a function that accepts 3 integer values a, b, c. The function should return true if a triangle can be built with the sides of given length and false in any other case.

(In this case, all triangles must have surface greater than 0 to be accepted).

Examples:

Input -> Output
1,2,2 -> true
4,2,3 -> true
2,2,2 -> true
1,2,3 -> false
-5,1,3 -> false
0,2,3 -> false
1,2,9 -> false