Final answer:
The length of AC is found by adding the lengths of AB and BC, which gives us a total of 19 units.
Step-by-step explanation:
To find the length of AC, we first need to determine whether AB, BC, and CD are consecutive segments that form a straight line. Assuming they do, since AB is 14 units and BC is 5 units, we would initially add these two lengths to get the length of segment AC using addition of unit lengths. However, the information about CD is also provided, which is 8 units. If CD is a continuation from point C in the same direction, we need to add this length as well to get the total length of AD. Nevertheless, for the length of AC, we only consider AB + BC. Therefore, the length of AC is the sum of the lengths of AB and BC, which is 14 units plus 5 units.
AC = AB + BC
AC = 14 units + 5 units
AC = 19 units