The figure formed by joining the mid-points of the adjacent sides of a parallelogram is a

The figure formed by joining the mid-points of the adjacent sides of a rhombus is a

The figure formed by joining the mid-points of the adjacent sides of a square is a

If one side of a parallelogram is 24° less than twice the smallest angle, then the measure of the largest angle of the parallelogram is

In a parallelogram ABCD, if ∠DAB=75° and ∠DBC=60°, then ∠BDC=