## The Geometry of the Great Pyramid

Pyramidographia is a project to provide detailed engineering drawings of the Great Pyramid at Giza. The Great Pyramid has been measured many times and countless theories about the origin and supposed meaning of its geometry have been proposed.

Detailed information about the geometry of the Great Pyramid can be found in many places on the internet. Flinders Petries The Pyramids and Temples of Gizeh has been digitised by Ronald Birdsal and the Giza Plateau Maping Project (University of Chicago and AERA) has created an accurate model of the plateau. The Guardian’s Egypt website contains a great collection of detailed photographs and Rudolph Gantenbrink has provided detailed information about the channels in the pyramid. Another invaluable resource are the Giza Archives at the Museum of Fine Arts in Boston. This includes a full pdf version of the very detailed work on pyramid geometry by Maragioglio and Rinaldi.

Problem with this data is that the Petrie book is very hard to read because it does not contain many plans and sections and the raw data of the Giza Plateau Mapping Project is not available to the public. I thus decided to create my own drawings.

## Drawings

These drawings are prepared in QCAD and should be printed on A3 paper to retain the scale. Only one drawing has been completed till date.

- Site plan
- General Layout
- Middle Chamber
- Gallery
- Ante chamber
- Upper Chamber

The substrate is by the weight of the pyramid, a denser packing obtained, ie. the density is by compression under the weight of the pyramid increased. There is also a reduction in volume of the pyramid, as a result of the weight of the actual mass and / or the exit of water. The peaks are therefore 10% lower, the rising ribs about 5% shorter. The base is unchanged.

Antoon,

The pressure in the middle of the bottom layer of the pyramid is only 384,800 kg/m

^{2}(148m * 2600 kg/m^{3}) or a mere 3.8 MPa. The crusing strength of limestone is between 15 and 250 MPa and the modulus of elasticity is 9-80 GPa. Using this data shows that the centre of the pyramid has compressed only several cm and not 10% as you indicate.Furthermore, if the pyramid was made out of low compression strength material then its shape would not be maintained because the centre would compress more than the edges.

Regards

Peter

Beste Beekers,

The most accurate information on the web is the eBook version of the work by Flinders Petrie. The pyramid is not perfect and the angle is different depending on where you measure. On average the angle for the sides is 51º 50′ 40″. The angle of the ribs follows automatically given the average length of the sides is 230.348 m.

Hai Peter Prevos

I am building a glas and wood piramid on my roof

I want the dimensions to be just like the cheops piramide.

the problem is that there are some different angles for the sides .

I do not know which is the right angle 51 ore 53 degrees for the flat sides??

the ribs ( corners ) have 40 , 42 ,45 degrees . ???

of course there is only one right angle.

Or is the problem the erosie/damaging in time ??

Who can tel me the real angles

Can you help me

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Thanks for the kind words DeSean. I hope to finish these drawings sometime next year and write a book about the geometry of the pyramids.

Lost design secrets of the Great pyramid are recovered by a mathematical “source of reasoning” developed by this author in an article titled “THE GREAT PYRAMID ARCHITECT HAD A SECRET” (see website)

The findings revealed are amazingly in agreement with the Anglocentric measurements recorded by W.M.Flinders Petrie in his famous book, “The Pyramids and Temples of Gizeh”.

suggest you read The Giza Power Plant by Christopher Dunn and exchange ideas with the author.

Many wonderful insights might result.

Hi Lambert,

I’m afraid I am not to impressed with Dunn’s work. It is based on much speculation. Why can’t the pyramids simply are what they are – massive tombs.

The pyramid as we are given it reasons from a ground level view of the matter.

The “pyramid is in a “box”. The “box” is hollowed out in such a way as to receive a “pyramid” (it is “pyramid shaped” inside when looking into it).

There are “three pyramids” in the construction of the one we see above the surface at ground level. “Two” are set one on top of the other, forming a “diamond” shape (or bottom to bottom, giving up six points). The third is formed by “cutting” the “box” in such a way as to create for section, which when turned back to back, form the third pyramid. These “three collectively form the whole pyramid” (we only see what above ground level.

The “summit” is not missing! It is down inside the collective pyramid.

Seems pretty odd no shows us how the underground (retaining walls) of the pyramid exist. No one reasons from how it is set in place. It is in a box. The path way around the pyramid, the walkway, is the “lip of the box”. We always get cut away graphs or illustrations showing us the interior. Where are the walls or flooring?

By the way, you cannot create a true pyramid unless you reason from a “rectangle” (refer to Egyptians veiwing the world as existing in a “rectangle” supported by for colunms (The “box” cut into four smaller pyramids, and when placed back to back create a pyramid of its own). In “mytholoy” it is found in stories dealing with the “sacred mountains”, like the one of “Moses” whom came down from the “mountain” and Broke the Tables” (tablets).

When “moses'” two tablets are brought together they form a “square” from the two “rectangles”. Those were the rules (laws) written on those “tablets” for breaking the “tables”. If you do not know “tables” and “tablets” are used by the different sources in translations of the “Moses” tale. How many sides are formed by three pyramids? These are the “twelve tribes”! By saying that “Moses” came down off the moutain, it is reference for his having found the “missing summit” down inside the pyramid, and then broke the “tables”.

Good luck, you will need it, more than you know.