Pyramid of Egypt

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Pyramid of Egypt
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Development of Pyramid
mastaba
a terraced Pyramid
Pyramid
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The one of the seven wonders of the world
Pyramid of King Khufu
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Pyramid of King Khufu

• The height 146m, the base side is a square and
  each side is 230m, gradient 52
• Used 2 million 3 hundred thousand stones which 
  is the average weight 2.5 tons
• It took about 20 years with one hundred thousand
  people on 3-month shift
• The ratio of height, circumference and length is
  1/2p

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The formula of the Pyramid

• ? H1 the height of Pyramid
• L1 the base side length of Pyramid (the one
  side length of the square)
• H2 the middle incline length between the
  summit and the bottom of the Pyramid
• H3 the sliding length from the summit of the
  Pyramid to the edge of bottom side
• T The angle of the Pyramid bottom and the
  incline
• The angle of L1/2 and H2 is 51degrees 51minutes
  14 seconds (about 52degrees) on the great Pyramid
  base

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The formula of the Pyramid

• Explain T52
• H1146, L1230 -gt L1/2115
• H1 /(L1/2)1.27
• In a trigonometric ratio table tan T 1.27
• therefore, T 52
• Explain height circumference 1 2 p
• height the half of one side 1.27 1 4 p
• 1 2 p
  /8
• therefore, height circumference 1 2 p

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Height comparison of Pyramid

• It is much bigger than the Statue of Liberty