Thanks Harte, The Ancient Egyptians did indeed use the seked to calculate gradients. We know because we have records, G1 is built on a 5 1/2 seked. which is a 5 palms + 2 digits run to a rise of 7 palms which naturally incorporates the pi ratio, (4 / (22/7) = 14/11) the rise run of the 5 1/2 seked. Most assuredly if the Ancient Egyptians had been cognizant and used pi they would surely have made a note of it somewhere, either in the papyri or carved in a obelisk or stele somewhere. Yet, there is no recorded record of any form of pi by the Ancient Egyptians. Rhind Mathematical Papyrus problem #50 demonstrates their method for finding the area of a circle which they then used extensively in the papyri for many different calculations never bothering to use the pi ratio. With their methods so clearly spelled out in the papyri did they even bother to calculate the circumference of a circle? If so, without pi how were they able to calculate the circumference of a circle?

Regards,
Jacob