Answer:
the angle shown is a straight angle value of which is equal to 180°
3x + 30. 6 = 180
3x = 180 - 30. 6
3x = 149.4
The first one is True
The second one is False
The third one is the second choice (came from Rome)
The last one is True
From the figure:
m∠A = 53°+18° = 71°
m∠B = 53°+50° = 103°
m∠C = 50°+59° = 109°
m∠D = 18°+59° = 77°