What is the missing statement in the proof?
[ {AE and DB bisect each other at C (Given)} ]
[ {AC = EC (Definition of bisector)} ]
[{2 vertical angles theorem} ]
[ {D = BC (Definition of bisector)} ]
[ {MACB = AECD (???) } ]
[ {SAS congruence} ]
What is the missing statement or reason that justifies the equality (angle MACB = angle AECD) in the proof?
