A standard depth micrometer has a flat end about 1/8" round (my sets) on the end of the measuring rod. It’s not hard at all to use in this application. Being dead center is not a concern…Dave
Exactly, no included angle specified nor an angle from a reference plane, for all we know the proposed block looks like so.Not really. Bisecting the angle yields two equal right triangles. The angle of the right triangle can be calculated here:
http://www.csgnetwork.com/righttricalc.html
and doubled to get the actual angle.
Tony is right though. Nothing in the information above indicates that the base of the angle is parallel to the surface.