geometry

 I'll be sure to keep an eye on this thread. Looking for the same issue. Bumped into your thread. Thanks for creating it. Looking forward for solution.
    

my ford benefits

In the diagram, U = 30 degrees, arc XY is 170 degrees, and arc VW is 112 degrees. Find arc WY, in degrees.

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arc VX + arc WY = 360 - (170 + 112) = 78

30 = 1/2 [(78 - VX) - VX]            arc VX = 9º

Arc WY = 69º