Can I measure the local angle between a freeform surface and the y-axis?

Dear all,

Is there a way to measure the local angle between a freeform surface and the y-axis? If yes, can I have Solidworks search for the biggest or smallest local angle the surface makes with the y-axis? And ideally, could I also have it show me all the local areas with an angle bigger than a certain threshold?

I attached some random freeform surface, not very specific or anything. I am interested in the angle with gravity, not the curvature of the surface.

Kind regards,

Sjoerd van de Velde

SolidworksDrawings And Detailing