Final answer:
The measure of BC in AABC - AEDC is 5 units.
Step-by-step explanation:
The measure of BC in AABC - AEDC can be found by using the triangle angle-side-angle (ASA) congruence postulate. Since both triangles share angle A and angle C, and side AB is congruent to side AE, we can conclude that triangle AABC is congruent to triangle AEDC. Therefore, the measure of BC is equal to the measure of ED, which is 5 units.