Triangle Problem with Triangle Congruency

Question

I came across this question and I could not solve it. It is probably really easy and I'm missing the point, but could someone please help?

Answer 1

$\text{Consider}$ $□ ABCD,$

$\text{It is given that}$ $AO=OD,OB=OC\implies$ $\text{Diagonals are bisected}$ $\implies □ ABCD$ $\text{is a parallelogram.}$

$\implies ∠ABC=∠BCD$

$ \implies ∠ACD=∠ACB+∠ABC \implies ∠ACD = 74+36$ $=\boxed{110}$