...Petrie recognized the Great Pyramid's seqed to be 14 to 11 (=7 to 5 ½) and determined that its height from bottom center to its top was 280 cubits and the distance from its center to its perimeter at the half-circuit point was 220 cubits. The length of its incline from ground-level center-side/half-circuit to its top was estimated at 356 cubits. The reason why this had to be estimated is that the pyramidion of the Great Pyramid was likely lost to vandalism. Indeed, if one assumes its height as a circle's radius, one obtains 2 x π x 280 cubits, which the measured perimeter of 1760 cubits (4 x 440 cubits). Thus, π can be expressed as twice its height into its perimeter, 1760/(2 x 280) = 3.14 = 31/7
It therefore appears as if Petrie, a thoughtful and measured man, insinuated in 1883 that the Great Pyramid's designer may have had an inkling of the concept of π possibly influenced by John Taylor's π-Theory (1859). He surely had heard how Piazzi Smyth's Theory of divine intervention in the design of the Great Pyramid had fallen on deaf ears back home in England, and so he minced his words carefully. What exactly did Petrie insinuate? All those who have proposed that π was on Hemiunu’s mind must believe that he wanted to intentionally embed the mathematical concept represented by π with, for example, the half-circuit-to-height ratio (880/280).
Accordingly, the Great Pyramid was meant to make a mathematical statement devoid of any other cultural meaning; basically an abstract symbol of a discovery in geometry. It is as if Old Kingdom scientist were pondering geometric figures and suddenly discovered that circles and diameters always relate by 31/7. This was important enough that an after-life monument for the king had to be constructed to enshrine this break-through.
I do not think this "π-Theory" holds water, in respectful disagreement to both Taylor and Petrie….