Answer:
x = 67.5
Step-by-step explanation:
x+3x+90 = 360
360 degrees in total, and right angle is 90 degrees
4x+90=360
4x=270
x=67.5 degrees
Check
3(67.5) + 67.5 + 90 = 360
202.5 + 67.5 + 90 = 360
270 + 90 = 360
360 = 360
The other guy is right. 100%.
