Answer:
Option D
Step-by-step explanation:
The measure of the exterior angle is equal to the sum og non-adjacent interior angle
=> 105 = 55 + x
Subtracting 55 to both sides
=> x = 105-55
=> x = 50 degrees
D. 50°
Angles on a straight line add up to 180 degrees.
180 - 105 = 75
Angles in a triangle add up to 180 degrees.
180 - 55 - 75 = x
50 = x
