Most of the files below are written by Mathematica
6. except the one which is written by Cabri2.
You need either Mathematica 6 or above / Mathematica player（free). The player can be downloaded from here（88Mbite).
To change the size of a CG, click the small vertical scale at the bottom right corner or directly click a CG and drag the green frame which will pop up around the CG. You can also change the view point with mouse.
You need plugins for Cabri2 to see a cabri file below, even if you have Cabri. To download plugins,please check these: cabri2 , cabri3D ．Once you install the plugins, you can manuplate figures on the files with mouse ． To move the whole figure, please drag with Ctrl key down . For reconstraction, please click the red inverted triangle. At the bottom, there are also original cabri files which you can directly manipulate with Cabri/Cabri3D SOFTWARE (not plugins)．
If you can read Japanese , you can get detailed explanations of these
files and mathematical proves from the PDF
section below. There are one-to-one
links to Cabri/Geogebra files. Note that , however, you should use 'back
button' of your browser when you come back
from these links, if you close the brouser,
it also closes original PDFs.
Non Euclidian geometry
), all rights reserved