Question

Figure ABCD is a parallelogram. Diagonals AC and BD meet at E, mDBC = 28°, mBCA = 78°, and mBEC = 74°. What is the measure of DAC?

Answer 1

DA and BC are parallel lines
now angle DAC and ACB are alternate angles.
Alternate angles shoule be equal
DAC = ACB or BCA
hence angle DAC=78