I find it amusing that Petrie could measure the entire Giza complex from north to south with minimum errors but was unable to measure accurately the smallest of the three larger pyramids being out between 2 and 10 feet.
here are Petrie's words ...
... What, then, is to be reckoned as the size of the true base of the Pyramid? Not the present edges of the granite, for they are utterly rough. And not the ends of the fine-dressed edges of the joints, for they end at various levels. But looking to the fact that all the courses of granite are intended to be equal, and a rather short two cubits each, it seems most suitable to take a mean of all the granite courses (since the upper are not thinner than the lower ones),and reckon the intended base of the Pyramid at one mean course height (40.3 ± 1.5) below the first joint. Remembering also that the Second Pyramid courses average two cubits each near the base, and the bottom course was just two cubits above the pavement. ... [www.ronaldbirdsall.com]
I repeat and will go on record as stating categorically that Lehner is WRONG !!! I mean just look at his ridiculous baseline he used and called it The Lehner Line. Absolutely ridiculous ... if you know anything about surveying, which I do having done it for a living for 8 and 1/2 years.
Menkaure's Pyramid was named 'Menkaure is Divine'. Smaller than his predecessors' pyramids at Giza, it has a base area of 102.2 x 104.6m (335 x 343 ft). - Lehner, Dr Mark, 'The Complete Pyramids', p.134