Final answer:
The measure of ∠dab in the quadrilateral described is 96 degrees, as it corresponds to angle D due to parallel sides with transversal AD.
Step-by-step explanation:
To find the measure of ∠dab in a quadrilateral ABCD with the given conditions that side AB is parallel to side CD and side AB is also parallel to side BC, we need to use the properties of parallel lines and transversals. Since angle D measures 96 degrees and AB is parallel to CD, then ∠dab must also measure 96 degrees because they are corresponding angles created by the transversal AD cutting through two parallel lines AB and CD.