Explanation:
Angles A and B form a linear pair, and are thus supplementary. Therefore, the measure of angle B is 180-105=75 degrees.
Angles E and F are a linear pair, and by the same logic, the measure of angle E is 70 degrees.
Since the sum of the measures of the angles in a triangle is 180 degrees, the measure of angle C is 180-75-70=35 degrees.
Since angles C and D are supplementary, the measure of angle D is 145 degrees.