Each side of the Great Pyramid rises at an angle of 51.5 degrees to the top. Not only that, each of the sides are aligned almost exactly with true north, south, east, and west. For a pyramid to ...

The pyramid builders must have measured incredibly ... To make it a square, each of these angles needs to be a right angle. You can check that they are by measuring across the diagonals - here ...

Khafre's Pyramid is second to his father Khufu's Pyramid in size, but since it is built on higher ground and at a steeper angle (about 53°), it appears taller. It is 695 feet on a side at the ...