Your quote 'Khafre = 216 meters/ side(nearly)'
216 modern metres = 708.66141 imperial feet / 2 = 354.330705 a lunar year or 12 x synodic months = 354.3672 days.
Secondly a lunar year 354.367 days if taken as metres ie 354.367 metres converted to imperial feet = 1162.6213 imperial feet x pi = 365.24844 a solar year 365.2422 days.
Whoever invented the metre did so with the imperial system in mind. See my post re the Lourve pyramid in Paris.
I know this is cut and paste but not any great length really.
With pleasure I wish to add a remarkable fact re the dimensions of this glass pyramid and to the cleverness of its architects. This may be common knowledge anong architects but for me it was a discovery.
Length of base given in drawing 35.42 metres. I am not sure if these figures are absolutely correct so if anyone knows then let me knows please.
Height 21.64 metres.
I asked myself why the odd numbers? Why not just 35 metres? for the base and 21 for the height.
Then I looked at the number 35.42 and thought about the closeness of this number to that of a moon based year.
A synodic month = 29.53059 days x 12 months 354.36 days close to the number given 35.42. Ok that is easily shaken off as a coincidence but look.
As in the drawing the length given is 35.42 metres now remember Pei the architect is an American and as I have been informed was living in his Manhattan home in January 2016 he turns 100 on the 27th April this year 2017. I looked at this odd number and converted to feet 35.42m = 116.20734 feet and I saw it straight away.
A circle inscribed into the base of the pyramid at the Louvre measures 365.076 feet 365 the number of days in a year.
By switching from metric to Imperial the architect has given the lengths for a lunar and solar year. 354 and 365. Interesting that the metre allows this??
And not only that he has done it again in the height as he has doubled his base length 35.42 x 2 = 70.84 and named this number FEET.
70.84 FEET = 21.6m. Not sure exactly which value for pi he used but so clever.