RLH wrote;

"
But you fell into the same trap as many do! You attempt to explain a GP base being less then 440 cubits when there is no real reason to do so.

9068.8 inches divided by 440 = 20.610909 inches per cubit.

20.610909 inches times 280 cubits = 5771.0545 inches! Petrie has GP height between 5769 and 5783 inches so 5771 is in the range. "

Thanks for your reply. Yes, it's a common thing for people to want the GP sides to be a perfect 440 cubits. It makes everything so neat and easily explainable. Problem is, that's not the true side lengths. And, yes, the Royal Cubit of the Great Pyramid really was 20.62 inches.

If you want the GP to be 440 cubits then the other pyramids would also have to have been designed starting from the base length as a round number of cubits. The Red Pyramid, built by Khufu's father, has side lengths of 8631 inches(719.25 feet). Using your cubit length that comes out to 418.7588233 cubits. Please explain the choice of that side length or retract your contention that the GP was designed from a base of an ever 440 cubits.

The Bent Pyramid sides would be 439.5730436 cubits because its base is 755 feet, close to 440 but off by several inches. Yet its height is 481 feet, which is 280 cubits of 20.61428571. We know that the cubit gradually got slightly longer over time due to copying the same rod over and over with a gradually building error, so that is a plausible cubit length for Snefru. Notice that it is LESS than your propose cubit length. That would be backward error accrual. Now taking that figure and applying it to the base length gives 439.5010395. Not a round figure. Same with the third pyramid, sides are odd dimensions of cubits but height is 280/sqrt 5. The only pyramid that seems to have round figure sides is Khafre's, and that is plausibly just the result of starting with a round figure height of 274 and applying the 3,4,5 slope to it. Which is more plausible as a starting figure, 411 or 274?

So your contention that the GP started with a base of exactly 440 cubits goes against everything we know about the other pyramids. Kind of a hard sell, I would say.