Question

if AOB are in a line find x ​

Answer 1

3x+90+x=180 (sum of angles on a straight line is180)

3x+x=180-90

4x=90

x=22.5

Answer 2

Step-by-step explanation:

3x+X+90=180. (linear pair)

4x=180-90

4x=90

x=22.5

3x=3×22.5=67.5