1. The problem states: "AD = 3m, not AB". We need to understand the relationship between points A, B, and D. 2. Since AD is given as 3 meters, and AB is not equal to AD, we know AB \neq 3m. 3. Without additional information about points A, B, and D or their positions, we cannot determine AB or any other lengths. 4. To proceed, please provide more details or clarify the problem statement.