Answer: 105 degrees
Explanation:
A trapezoid is 360 degrees. We know that A and B, and D and C are equal degrees. This means we can add A and B together. Since A is 75, that's 75*2. This is 150. There's a remaining 210 degrees unaccounted for. Since there are two more unknown degrees (D and C), and they are both equal to each other, you would split the 210 degrees, thus giving you the answer of 105.