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 Discussion: All Topics Topic: CutOuts What does the 0 to 1 interval mean? Related Item: http://mathforum.org/mathtools/tool/16775/

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 Subject: RE: CutOuts What does the 0 to 1 interval mean? Author: lanius Date: Aug 10 2006
On Aug 10 2006, Jon wrote:
> I think the 1 to 100 scale refers to the percentage of the dihedral
> angle each face has been rotated. For example, if you build a cube
> and set the scale to 50, it looks as if the angle between each
> square face is 45 degrees which is half the dihedral angle for a
> cube of 90 degrees. Why when you move the pointer to 100 does 10
> appear in the little box?

I couldn't think of a mathematically precise way to describe it. "Closed up half
way" just didn't cut it. Thanks, Jon. I can't recreate the 10 appearing in the
little box, however. That doesn't happen in my browser.

Do you know of a tool that would allow the students to put the polygons together
to form the net. I think that would be a nice problem. How do you put the
polygons together into a net so that it will fold up to form the polyhedron? So
then it would be problem solving rather than just a demonstration.