Question

Please help and explain if you can

Answer 1

Answer:

I think the answer is 100, but correct me if im wrong

Answer 2

X would be 40 because the angle is inscribed meaning that it’s half the arc since we half 100 and we have half a circle.That means we need the other arc BC to be 80.
Z would be 50 since it’s half the arc which is 100.