According to ''National Geographic'' it took an estimated 20,000 to 30,000 workers to build the Pyramids at Giza over a period of 80 years from about 2570 to 2490 B.C. and slaves were not used.
The main pyramids are -
The Pyramid of Khufu also known as The Great Pyramid of Giza and the Pyramid of Cheops [his Greek name] Dated around 2560 B.C.
The Pyramid of Khafre. Dated around 2520 B.C.
The Pyramid of Menkaure. Dated around 2490 B.C.
More recent research has indicated that nowhere near as many people as originally believed was involved in the construction of the pyramid. In truth, perhaps only around 5,000 were actually on the building site, although there were an equivalent number of support people. However, for the time these were immense groups which would not be matched for centuries.
There are three pyramids in Giza.
There are no pyramids actually in Giza.
There are three pyramids in the Giza Necropolis.
around two million block stones were used to build the pyramid of Giza
This is the smallest of the Giza pyramids. Perhaps 5000
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It is estimated that in excess of 2,000,000 limestone blocks were used in the pyramids of Giza.
I believe that they are three main pyramids in Giza.
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The Great Pyramids of Giza are wonders because they still stand today, although they are centuries old and are made out of stone. Also, it must have taken many many many years for the Egyptians to build them, and scientists are still puzzled on how they built the pyramids.
There are three major ones.
The three main pyramids of Giza have base areas which sum to 110,120 square metres.