However I could not get any tangible measurements. I tried to use the same methodology as the the article above but I failed to create a plane using three points and I’m rather stuck now.
Please go to the markups module, click on create a plane but don’t click on a view yet, stay on the side panel. Then, there is option to create the plane from 3 points and other configurations. Now you can go to the 3D or sliceView and create your plane from 3 points