Could you please verify if yours or theirs is correct?
The info is my article is taken from Les Brown's book on building pyramids. The fig. in the article is scanned directly from his book. I'm quite sure that Les Brown would not put the wrong diagram in a book devoted to building a pyramid like the Giza pyramid. After all, Les Brown BUILT his pyramid based on the info presented in his book and got the results with mummification and accelerated plant growth etc., using his dimensions and drawings.
The guy who is telling others (Keith Wilson -right) that the diagram is "wrong," is wrong himself. He's making assumptions without having carefully read the article or more importantly, read the Les Brown book (which I embedded as a free download link in the article). His comments are disparaging and derisive towards me and my silly, "woo woo" article. My "geometry" isn't any better than my "logic" apparently:
". If the height of the triangular faces (measured along the face, perpendicular to the base) is sqrt2/2, or .707 more or less, then the height of the pyramid is 1/2 the dimension of the edge of the base, the angle between the base and the side faces is 45 degrees, the angle between the triangular faces is 120 degrees, and the bevel angel is 60 degrees. This is what that woo-woo web page describes. Their geometry isn't any better than their logic on other subjects. "
I read the link over quickly and will study the pages more closely to be sure, but I think I know where they are going off. Keith Wilson, who said in #244 that my posted diagram is wrong, doesn't realize that the "diagonal" line and the "apotherm" line, which is the height from the center line of the sloping side face to its apex, is the SAME length. The top of the pyramid is sloping INWARD from the base. This changes the angle of the slope when measured in 3D. If the apotherm height is as according to the Les Brown diagram, and as shown in my article, then you will get the correct angle of 51 degrees, 51 minutes and 14 seconds from a plumb line running from the apex down to the center point of the pyramid's footprint.
A couple of years ago, I got a phone call from an architect who was hired to build the pyramid and he made the same presumptive error as Keith Wilson has made concerning the correct understanding of the definition of "apotherm."
It's always a mistake to assume that some self-assured hotshot, who's the local genius on a hobbyist CAD forum, is going to know more about building pyramids than the guy who wrote the book and produced the described results.
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