Answer:
I'm not really sure but I think it's 160°
Step-by-step explanation:
ST is equal to 30° x 2 so 60°
Now, you'll do 60+140 which equals to 200°
A full circle is 360° so, 360 - 200 = 160°
Ps: I'm not sure but I think this is correct.
I hope this helps :)
