To determine whether three side lengths \( a \), \( b \), and \( c \) can form a triangle, the following triangle inequality conditions must be satisfied:
- \( a < b + c \)
- \( a > |b - c| \)
So, the completed statements are:
- \( a < b + c \)
- \( a > b - c \) (this can also be expressed as \( a > |b - c| \))
Generally, the three conditions can be summarized as:
- \( a < b + c \)
- \( b < a + c \)
- \( c < a + b \)
These inequalities ensure that the lengths can indeed form a triangle.