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Sacral geometry is sacred geometry of the shapes, which lay the foundations of life and the pyramid is one of its most powerful symbols.
The Egyptian pyramids appear to be an incredible example of geometric and mathematical mysticism.
The three pyramids at Giza are positioned in a rectangle formed by the figure vesica piscis, which is formed when the centers of two circles with are equal radii to each other.
The area bounded by intersecting arcs is the vesica piscis.
The main constant in architecture, painting and science is considered to be the Golden ratio, same as the proportions of the Great Pyramid at Giza. The pyramid contains a huge amount of information about the structure of the universe, the solar system and the man, encoded in its geometric shape in the form of an octahedron, which half it represents.
Aerial photos show that the pyramids at Giza are located on a line that clearly correspond to the Fibonacci spiral. The tip of each of the three pyramids lies on the spiral of the Golden Ratio or the Fibonacci spiral, which when unfold is close to the spiral of the Golden Ratio.
Ancient builders have built this magnificent monument with engineering precision and symmetry. This miracle building is not built on equal ground but on a massive natural hill with a height of 9 meters, occupying 70% of the base of the pyramid.
Calculations show that the parameters of the three main pyramids and others located in the Giza Plateau (height, angles, perimeter mutual disposition) are interconnected.
The construction of the Great Pyramid is based on proportions Phi = 1.618. The architects of the pyramids embodied in the stones the founding principles of the sacred geometry:

The perimeter of the base of the Great Pyramid divided by the double height gives pi 3.1415 … (921.45 / 2 * 146.6 = 3.142).

The perimeter of the base is equal to the length of the circle whose radius is equal to the height of the pyramid (2 * 3.14159 * 146.6 = 921).

The length of the fundamentals expressed in the Egyptian „cubits“ (one of the values is 0.635 m) corresponds to the length of Earth’s year (230 / 0.63 = 365).

The sum of the four sides of the pyramid – 921.45 m, is equal to half a minute of the width of the equator. One degree of the width of the equator covers 110,573 meters, and each arc minute – 1842.88 meters, which is more than twice the perimeter of the pyramid.

If you multiply the original height of the Great Pyramid – 146.6 m by 1 million you get the smallest distance from the Earth to the Sun – about 147,098,074 kilometers (perihelion).

The ratio of the original height of the Great Pyramid to its base was 7:11. This ratio has a number of important geometric properties. It contains the numbers Pi and Phi.

The size of each of the borderlines of the pyramid is equal to the square of its height.

The length of the borders of the pyramid divided by height gives Phi – 1,618.

The length in feet – 484.4 corresponds to 5813 inches (5813 – numbers of the Fibonacci sequence).
If two perpendicular planes go through the center the pyramid you get two double golden triangles whose intersection give a cross in a square – one of the main esoteric symbols of ancient Egypt.
Pyramid is an example of the squaring the circle – one of the three famous unsolvable problems of antiquity, superbly solved by the ancient architects.
The circle symbolizes the eternity, the Sun, Ra. The circle is eternal, cyclical, but lacks direction; any movement in circle is equal no movement at all.
The ancient Greek symbol of eternity Shen is a ring with a band at the bottom. God Horus, depicted as a falcon has in his claws the symbol of eternity Shen – symbol of the soul Ba.
The square symbolizes matter, earth, the four cardinal directions, the four sons of Horus. The square introduces a system of coordinates, its directions and angles are precise and perfect.
Source: http://ancientsbg.com