The document discusses the pyramids at Giza in Egypt, specifically the Great Pyramid of Khufu, which is the largest structure ever built. It details the Greek historian Herodotus's account of the pyramid's construction, which involved 400,000 men working in shifts of 100,000 over 20 years. The document also provides key measurements and area calculations for the triangles that make up the Great Pyramid of Khufu as well as the smaller pyramids of Khafre and Menkaure at Giza.

1. THE PYRAMIDS AT GIZAH, EGYPT Desirée Muñoz Marina Montull Sara Vega Adrián Rodríguez Marc Murcia

2. TRIANGLES IN THE PYRAMID

3. HISTORY The Pyramid of Khufu at Giza is the largest single building ever constructed. The Greek historian Herodotus visited Giza in 450 BC, Sacerdots told him that the pyramid was built by the pharaoh Khufu ( c. 2575– c. 2465 BC). The Great Pyramid had taken 400,000 men 20 years to build, in three-month shifts of 100,000 men at a time.

4. AREA OF THE TRIANGLES OF THE PYRAMID Great Pyramid of Giza: Base : 230.35 m Original high : 146.6 m Area : 16884.655 m2 Actual high : 138.8 m Area : 15986.29 m2 Pyramid of Khafre: Base : 215 m High : 143.5 m Area : 15426.25 m2 Pyramid of Menkaure: Base : 104.6 m Original high : 65.55 m Area : 3428.265 m2 Actual high : 62 m Area : 3242.6 m2