Its about 50 feet shorter in length than the GP and 11 feet shorter in height.'
Hello Molder and Merrell,
Try this for size.
Original intended planned height of Khafre's pyramid was the same as the height of Khufu's pyramid @ 280rc.
This was reduced by 20rc divided by 3 1/7 @ 6.364rc - thus making the intended height 273.636rc (5645.66 British inches/143.4m).
Lehner gives height as 143.5m - difference 0.1m
Seked 5.25 (equiv. 1.3333 - triangle 3:4:5) was chosen for the intended gradient of the faces.
This makes the intended horizontal distance between a side at the base and the apex of the pyramid 273.636rc divided by 1.3333 = 205.227rc.
Length of side at the base then 205.227rc x 2 = 410.454rc (8468.49 British inches/215.1m).
Lehner gives length as 215m - difference 0.1m.