As said above,<u>opposite sides</u>in a parallelogram are equal. Thus, the value of x must be 28 units,as the measure of the opposite side of "x" is 28 units.
In paralellograms, the lengths of the parallel sides are equal to each other
As seen in the figure, the side that is parallel to the side that is represented with x has a length of 28 units, so the value of x is also equal to 28