Answer:
∠ C = 98°
Explanation:
AB and DC are parallel lines
A quadrilateral with one pair of parallel sides is a trapezium.
the lower base angle is supplementary to the upper base angle on the same side, that is
∠ C + ∠ D = 180°
∠ C + 82° = 180° ( subtract 82° from both sides )
∠ C = 98°