How Tall Was the Great Pyramid?

The three large pyramids of Menkaure (L), Khafre (C) and Khufu loom over the horizon November 13, 2004 at Giza, just outside Cairo, Egypt. The three large pyramids at Giza, built by King Khufu over a 30 year period around 2,550 B.C., are among Egypt's biggest tourist attractions. (Photo by Sean Gallup/Getty Images)

Question: How Tall Was the Great Pyramid?

Answer: The tallest of a cluster of three pyramids at Giza, the Great Pyramid was originally about 146 meters tall, but it has lost about 10 meters in height over the millennia. Erosion and burial in sand contribute to the shrinkage. The base of the Great Pyramid is about 55,000 meters.

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