Rhind Mathematical Papyrus Problem 50. A circular field has diameter 9 khet. What is its area. The written solution says, subtract 1/9 of of the diameter which leaves 8 khet. The area is 8 multiplied by 8, or 64 setat.They simply say subtract 1/9 of the diameter and square the result. All extrapolations regarding pi are ours,
There is no extrapolation of pi by the Ancient Egyptians area of a circle, Rhind Mathematical Papyrus Problem 50 and Moscow Mathematical papyrus Problem #10 <[www.math.buffalo.edu]; (scroll down) calculating surface area of a hemisphere.
The Ancient Egyptians made no notations of pi anywhere. Unfortunately, when you say Egyptian pi you are actually speaking of our extrapolated value, based on our understanding and methods of making circular calculations, not theirs.
Here is a thread on the subject on Ancient Egyptians using pi you might find of interest: <[grahamhancock.com];