Answer:
100⁰
because this is a quadrilateral inscribed in the circle
=> x + 80 = 180
<=> x = 180 - 80 = 100⁰
? = 4/3 π(1 1/4)
<span>Answer: 8</span>
Answer



Hope this helps you.
Let me know if you have any other questions :-):-)
Finding an angle of a triangle