File:Thales theorem 6.png
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English: Computing the height of the Great Pyramid of Giza using a stick and the lengths of the shadows on the floor. An illustration of the geometric intercept theorem, attributed to Thales.
Height of the Cheops PyramidAccording to some historical sources the Greek mathematician Thales applied the intercept theorem to determine the height of the Cheops' pyramid. The following description illustrates the use of the intercept theorem to compute the height of the Cheops' pyramid. It does not however recount Thales' original work, which was lost. Thales measured the length of the pyramid's base and the height of his pole. Then at the same time of the day he measured the length of the pyramid's shadow and the length of the pole's shadow. This yielded the following data:
From this he computed Knowing A,B and C he was now able to apply the intercept theorem to compute |
Date | |
Source | Own work |
Author | Dake |
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Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled GNU Free Documentation License.http://www.gnu.org/copyleft/fdl.htmlGFDLGNU Free Documentation Licensetruetrue |
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This licensing tag was added to this file as part of the GFDL licensing update.http://creativecommons.org/licenses/by-sa/3.0/CC BY-SA 3.0Creative Commons Attribution-Share Alike 3.0truetrue |
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current | 22:54, 10 August 2005 | ![]() | 1,056 × 655 (63 KB) | Dake~commonswiki (talk | contribs) | Thales' theorem - computing the height of the Great Pyramid using a stick and the lengths of the shadows on the floor Drawn with Inkscape 0.42. {{GFDL}} Category:Geometry |
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