Tuesday, October 18, 2016

Perigal's dissection proof of the Pythagorean theorem

This is a Java Applet created using GeoGebra from www.geogebra.org - it looks like you don't have Java installed, please go to www.java.com
Shown here is the famous dissection proof of the Pythagorean theorem by Henry Perigal.




It can be shown in animation form, and that is what we have done here. Please click on the link given below and follow the instructions.


For some biographical details of Henry Perigal, it is best to look at the Wikipedia link: Henry Perigal
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2 comments:

  1. dakshOctober 18, 2016 at 10:26 AM

    Quite delightful...How many proofs of the Pythagorean theorem exist?

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    Replies
    1. Shailesh ShiraliOctober 19, 2016 at 6:52 AM

      At last count, there were more than 350 proofs! Possibly, some of these have rather similar themes. Nevertheless, there are a good many proofs that are entirely different from one another. I will follow up in a later post elaborating on this comment and giving some links to these proofs.

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