Please help solve, pretty easy but idk how to do them, I have more of these please help

Answer:-
first take the angle sum property in triangle CAB
45+30+∠B=180
75+∠B=180
∠B=180-75
∠B=105
In a parallelogram, opposite angles are equal
therefore,
∠D=105(opposite angles are equal)
hope you find it helpful