Answer:
67.5°
Step-by-step explanation:
Given, 90° + x + 3x = 360°
4x = 360° - 90°
4x = 270°
x = 67.5°
67.5
[tex]3x + x + 90 = 360[/tex]
[tex]4x + 90 = 360[/tex]
[tex]4x = 360 - 90[/tex]
[tex]4x = 270[/tex]
[tex]x = 270 \div 4 = 67.5[/tex]
i think this is the answer
