Clive Wrote:
-------------------------------------------------------
> Rob:
>
> From Petrie's direct measures.
> At the 5408 inch level above base the average
> width of the structure is 219x2 = 438 inches.
> The structure is 9068 inches at the base.


you forgot the .8 with +/- .5 deviation to be exact quote.

[touregypt.net]
“The mean base being 9068.8 ± .5 inches, this yields a height of 5776.0 ± 7.0 inches.”

PEAK = 5780 Inches Used [Middle or “mean” value based on Petrie Measure]
BASE = 9072 Inches Used [ <3 inch deviation from Petrie “mean” Measure and well within logical boundaries]

> Therefore the width change 8630 (9068-438) is a
> result of the rise 5408 inches.
> The half width change is 8630/2 = 4315
> Ratio of rise:run is 5408/4315 = 1.25:1...or
> 5:4...not 4/pi.
> Base casing has a 4/pi slope, but not the pyramid.
>

triangulation of the figures will equate using Pi/4 when Pi=22/7,and that correlates with the natural seked measure of 14:11.

After all.... 440 royal cubits ...times accepted cubit of 20.62 inches = 9072.8 inches ...which is more then 9072 listed, therefore more deviation from petrie "mean" base above... I personally use 20.618 cubit.

cheers