NonEuclid.4.0.sea.hqx

NonEuclid is a "sketch pad" for the Poincare Model of Hyperbolic
Geometry.  At the outset, all that is drawn is a circle.  Using 
choices from the menu, points, line segments, lines, angles, 
perpendiculars, circles, intersection points, and midpoints can 
be constructed.  As each item is drawn, relevant information about
it appears in the margin.  Once figures are drawn, the program will
perform measurements on them including distance between points, 
size of angles, and areas of triangles.

There is a menu of "What to Do" items, each of which is a series
of questions for the student to answer using the program.  There are
also four pages of on-line help.  Clearly, this is a program with 
the student in mind.  

Color is supported.  Menus are missing the usual Macintosh amenities
of keyboard shortcuts, and the screen is not dynamically updated, 
though there is a redraw menu selection.  It would also  be nice
to be able to move existing points and have the figures related to
that point move accordingly.  In this way, students could see even
better, the non-homogeneous nature of the model.

With the variety of implementations available, the program should
run on nearly any Macintosh except the new PowerMacs.  (Even with 
SoftwareFPU the program did not run.)  Tested under System 7.1 in 
32-bit mode with no difficulties.

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Location in Mathematics Archives:
  Anonymous FTP:  /mac/geometry

  Gopher:
    (First select "Software" then "Macintosh software arranged
     by subjects")
                  Geometry / NonEuclid

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