Answer:
∠DAB = 34°
Step-by-step explanation:
You want to know the measure of ∠DAB in rectangle ABDC with diagonal AD and angle BDA = 56°.
Complementary
The acute angles in each right triangle are complementary:
∠DAB +∠BDA = 90°
∠DAB = 90° -56° = 34°
The measure of angle DAB is 34°.
