In H. R Butler's book "Egyptian Pyramid Geometry", he quotes M and R as saying that they measured the angles of casing blocks that were lying around the pyramid and found the angle to be 44 degrees. Butler also says that Robins Shute give 44 degrees from their photogrammatic study.

According to Petrie's survey, and I think Legon says that Dorner's survey confirmed this, the angle of the lower portion of the bent varies by over one degree. Considering that Poltz only took measurements of the few remaining casing stones right at the bottom of the Red, how do we know, even if his reported angle of 45 degrees is correct, if this is representative of the overall angle of the pyramid.

Of all of the surveys of the Red, the reported angle varies from just slightly over 43 degrees to an absolute maximum of 45 degree from the new survey of the remaining in situ casing stones at the bottom of the pyramid. I am not sure that taking the extreme upper end of the range, from a survey of a limited area of the pyramid, is the best methodology, even if it is the most recent information.

As I understand it, Stadelmann himself previously gave figures of a lower height and lower angle for the Red, as in the Encyclopedia of the Architecture of Ancient Egypt, on page 215 found here:

<[books.google.com];

I wonder if Stadelmann is actually saying now that he believes the overall angle of the Red was 45 deg, making the height 210 cubits, or if he is just saying that the angle of the in situ casing stones at the base of the pyramid are 45 deg.