WWW, XXX, Y Y\,Y and Z Z\,Z are points on the circumference of a circle, centre OOO.
Angle WZY=112∘WZY = 112^\circWZY=112∘ Angle WOY=a∘WOY = a^\circWOY=a∘
Work out the value of aaa.
You must show all your working.
