Respuesta :
In a triangle the sum of two sides is always greater than the third side.
9-9 < x < 9+9
0 < x < 18 ← answer
9-9 < x < 9+9
0 < x < 18 ← answer
In a triangle the sum of two sides is always greater than the third side.
9-9 < x < 9+9
0 < x < 18 This is the answer