Answer:
D. 85
Explanation:
Find the angles on the inside of the triangle by doing 180 - the external angle (all angles in a straight line = 180 degrees),
eg. 180 - 133 = 47
180 - 142 = 38
Then to find the final angle inside the triangle, (using your knowledge that all angles in a triangle add to 180 degrees):
Do 180 - 47 - 38 = 95
Then 180 - 95 = 85
The answer is 85 degrees (D)