Answer:
37°
Step-by-step explanation:
AB is diameter.
Angle made by diameter on circumference is always 90°
[tex]x + 90 + 53 = 180[/tex]
Calculate the sum
[tex]x + 143 = 180[/tex]
Move constant to R.H.S and change its sign
[tex]x = 180 - 143[/tex]
Calculate the difference
[tex]x = 37[/tex]
Hope this helps..
Best regards!!
