Final answer:
After a sequence of rotations, the original angle size of 37 degrees remains unchanged at 37 degrees, as rotations do not alter the angle size.
Step-by-step explanation:
If angle ABC originally measures 37° and it undergoes a sequence of rotations, the size of the angle remains 37°. Rotations do not change the size of an angle, but rather change its orientation. Therefore, regardless of the sequence of rotations, the size of the angle stays the same.