In the diagram, angle u= 30 degrees. Arc XY is 170 degrees, and arc VW is 120 degrees. Find arc WY, in degrees.
arc WY + arc VX = 360 - (arc XY + arc VW) = 70º
arc VX = n arc WY = 70 - n
∠U = 1/2(arc WY - arc VX)
30 = 1/2[(70 - n) - n]
arc WY = 65º (arc VX = 5º)
