How Was Math Used in Building the Great Pyramid

Abstract
The Egyptians have had many great wonders. One of these wonders are pyramids. Because this was an ancient wonder, many people believe that the Egyptians didn't use any math but only used logic and reason to build pyramids. If this is true, then how did they build the Great Pyramid? They used simple math to make such a great pyramid. They used the Pythagorean Theorem, trigonometry and simple algebra. They also measured the angle of each direction so that each side of the pyramid was facing exactly north, south, east and west.
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