In the given figure, ABCD is a rhombus in which diagonals AC and BD intersect at O. Then measure of ∠AOB is.
60o
90o
45o
80o
The intersection of the diagonals of a rhombus form 90 degree (right) angles.
The diagonals AC and BD of a parallelogram ABCD intersect each other at the point O . If ∠DAC=35∘ and ∠AOB=80∘, then ∠DBC is equal to ___.