This means the GP builders knew how to align a long shaft to true north, and they knew which star was the pole star/North star.
Ancient egyptians did not have this modern knowledge.
Is there some reason that the ancient egyptians could not have gone out at night, looked up at the sky and pointed to the pole star? That is all that would be needed to align the shaft with the star. They would need no math, no science and not even needed to know that it was North.
Where did the British get their inch ?
It inch came from the latin uncio meaning one twelth, which related to the royal foot. It was approximately the length of the second digit of the first finger of the royal right hand and one twelth of the royal foot.
And so far we have not dealt with who built the Pyramid. IYRC, that was to wait until the issues in the first Group of questions was resolved. If you would like to start a tread on who built the Great Pyramid I would be happy to try to show that it was the Ancient Egyptians.
Aslan is not a Tame Lion