leaning tower of pisa,,?
919280
Don`t worry Norman, someone will ask again!!!!
134391
Almost all buildings settle as the weight of the building compresses the subsoil supporting it.  In a typical house that may cause a only a few cracks in the plasterboard walls, etc.  But you would never notice from the outside.  For a very tall narrow building a little settling would be magnified by the height.  And once tilted, the load on the subsoil would no longer be evenly exerted and the tilt may help increase itself.  When the Tower of Pisa was built, much less was known about soil engineering and you took what you got, especially if the building far outlived the builders.  I believe that there have been many schemes to return the tower to plumb but little interest because the tower would lose its historical appeal.  They just want to reduce the tilt if necessary and insure that it never actually topples.
88067
probably to put up a taller building
11927
The Official website for the Tower leans beacuse of layers of clay and water under the Tower.  It was closed for several years in the 90s to reinforce the foundation.  It has reopened to visitors and currently appears to be stable.
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http://archrecord.construction.com/news/wtc/#
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Here's a few websites, do your own homework!  :-)\n\nhttp://www.nature.nps.gov/nnl/\nhttp://www.cubekc.org/architivities/landmark.html
709207
Tourist observation floors from 88th to 102nd.\n\nThe buildings main masonry structure goes up to the 88th floor and then the other 14 floors above are constructed of aluminium and glass.
465733
That would be a triangle....
983012
Your book,the reading table,the trees,themountins,a monument,a fridge or an airconditioner ll contain right angle.Actually there is a branch of mathematics known as Trigonmetry which helps us to find the exact mesurements of high structures without actually measuring it with the help of the right angle they form with the ground
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here it is ! :\nhttp://www.digitalino.com/toilettecast/seduto_cesso.jpg
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Hello Photolove, here are some great links about the history of the Eiffel Tower.\n\nHistory Of Eiffel Tower\n\nFrom 1889 to 2002, the Eiffel Tower has welcomed 200 million visitors of all ages and origins from the four corners of the globe, who have come to admire the "Iron Lady" and the city panorama from its 324-meter height. An impressive statistic that confirms the monument's reputation as the most visited site with an entry fee.  MORE…….\n\nhttp://www.cse.dmu.ac.uk/~hc01hs/mult1001/eiffeltower.html\n\nhttp://www.corrosion-doctors.org/Landmarks/eiffel-history.htm\n\nThe Eiffel Tower was built for the International Exhibition of Paris of 1889 commemorating the centenary of the French Revolution. The Prince of Wales, later King Edward VII of England, opened the tower. Of the 700 proposals submitted in a design competition, Gustave Eiffel's was unanimously chosen.  MORE…..\n\nhttp://www.paris.org/Monuments/Eiffel/\n\nhttp://www.tour-eiffel.fr/teiffel/uk/\n\nhttp://www.parisbestlodge.com/eiffeltower.html\n\nhttp://www.discoverfrance.net/France/Paris/Monuments-Paris/Eiffel.shtml\n\nMathematicians commemorated on the Eiffel Tower\n\nhttp://www-history.mcs.st-andrews.ac.uk/history/Societies/Eiffel.html\n\nGood luck.\n\nKevin, Liverpool, England.
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It has a hole in it to represent a piazza. This is a major signifcance in Italy.
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I'm thinking of the Moorish architecture in Spain that was built in the Middle Ages.  They are the ones with domed ceilings and arched doorways.  Their architectural achievements were copied throughout Europe.\n\nSue
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The surface on which the structure is being built.
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From memory: The Leaning Tower has been slowly sinking into the earth since it was built.  When this was discovered by the original builders, they corrected for the lean by adjusting the line of the tower so that it curved away from the direction of lean, thereby compensating for the sink.  However, over the centuries, the building has continued to sink, thereby increasing the lean beyond the degree compensated for by the curve.\n\nFrom Wikipedia:\n\nOn February 27, 1964, the government of Italy requested aid in preventing the tower from toppling. A multinational task force of engineers, mathematicians and historians was assigned and met on the Azores islands to discuss stabilization methods. After over two decades of work on the subject, the tower was closed to the public in January 1990. In the time that the tower was closed the bells were removed to relieve some weight and cables were cinched around the third level and anchored several hundred meters away. Apartments and houses in the path of the tower were vacated for safety concerns. After a decade of corrective reconstruction and stabilization efforts the tower was reopened to the public on December 15, 2001. Many methods were proposed to stabilize the tower including the addition of 800 metric tons of lead counterweights to the raised end of the base. The final solution to correcting the lean was to remove 38 m3 of soil from underneath the raised end. The tower has been declared stable for at least another 300 years.
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trebuchet or avant garde
441757
Perhaps the 9/11 monument constuction?