We try to collect all proofs of the Pythagoras Theorem without using
algebra available in books and webpages.
Example labels such as proof24, etc., mean Proof #24 from the 72
proofs in the webpage:
www.cut-the-knot.org/pythagoras/index.shtml.
Except for proof01, proof24, and very few others, all other solutions
do not have the corresponding animated versions as we do. Some
examples have dynamic versions meaning that some points in the
diagrams can be dragged.
This collection includes about a dozen of proofs in the three excellent books on PWW.
However, we currenlty do not include those proofs that involve
algebraic computations in the three books.
The rest proofs are from other books.
The original credit explanation of each proof will be inserted into
each example soon. Of course any errors or misrepresentations are
our faults.
All animations have been created with JGEX (Version 0.40 Beta) and are
copyrighted by Shang-Ching Chou, Xiaoshan Gao, and Zheng
Ye. Permission of posting the gif animation files is granted if all
three original authors are mentioned and an email on notice of
posting is sent to
Shang-Ching
Chou.
However, profitable postings of our original animated gif files must
have the authors' explicit permission.
The original "*.gex" examples would not be changed and have generally
much better animations than their counterparts of gif files posted
here, but they need our JGEX system. Currently, The verion of JGEX is
0.40 Beta. Hopefully, by another 6 months we will have a version
0.80 Beta publically availabe with all examples here and more
examples created from now on. We will not upgrade to a higher (than
0.80 Beta) version until automated generation of the area method
has been done to our satisfaction.
