Great Pyramid of Giza has implemented in itself several geometrical ratios/numbers
Number Pi: Perimeter/height = 2 pi (230.34*4/146.7=2 *3.1402)
Golder Ratio: Angle between vertical line and a side of the pyramid represents golden ratio
Distance from Sun: The height of the pyramid represents exactly one bilionth of the distance between Sun and earth (147 meters, 149,5 million kilometers)
There are theories that Pyramids were never meant to be tombs for Pharaohs but rather were built much earlier as observatories