It appears that the surfaces you are measuring between are parallel with each other. This would result in no angle. If you select a horizontal edge on the left part, and a vertical edge on the right part, do you get a 90 degree angle?
Yes they do go to 90°, From what you have showed me. I want the angle from top corner to the top corner on the right part. However, this video may show a better explanation what is going on. Also while I have this video on . How to move the dimension window to see the the measurements.
If you want to know the angle from corner point to corner point, you should draw a line and simply look at the angle of that line by clicking on it and viewing the angle input box. If you need to show the actual angle dimension using PMI, just select your newly drawn line instead. You never show the full Solid Edge screen in your videos, but I assume you are doing this in a sketch.