Answer:
x = 32°
Step-by-step explanation:
First, find the measure of the obtuse angle that constitutes the straight line.
180 - 72 = 108°
(3x + 12)° and 108° are corresponding angles.
Corresponding angles are angles that form when a transverse line cuts across two straight lines. They are in the same position or corner of the line, making them equal to each other.
(3x + 12)° = 108°
3x + 12 - 12 = 108 - 12
3x = 96
x = 32°
Hope that helps.
