Final answer:
The length of AC in the triangle is 2.5 units.
Step-by-step explanation:
The given equation is DAC = BAD. In a triangle, the length of one side is equal to the sum of the lengths of the other two sides. So, AC = AD + DC.
Substituting the given lengths, AC = DAC + DC = BAD + DC.
Therefore, the length of AC is 2.5.