Answer:
102 degrees
Explanation:
m< CDA & m<CBA are both 78 degrees because they are both acute angles.
m<DAB & m<DCB are both 102 degrees because they are both obtuse angles.
Whenever you add 78 + 78 + 102 + 102 you get 360 degrees which is how much a four-sided figure should be.
Hope this helps!