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Topic: Is a rhombus a kite?

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Subject:   RE: Is a rhombus a kite?
Author: aterner
Date: May 5 2005
This states that the rhombus is a special case of the kite.
Eric W. Weisstein. "Kite." From MathWorld--A Wolfram Web Resource.
My current book (McDougal Littell-Geometry Applying, Reasoning and
Measuring)says opposite sides must be different.
I don't think it should be necessary for the opposite sides to be different.
This is another example of great discussion in math class.
I like to discuss concepts to show that math is not just a bunch of rules that
never evolve. We talk about the relative newness of fractal geometry, the many
ways we do proof now that we didn't do when I went to high school in the 60's.

On May  5 2005, Susan wrote:
> I know we had a big discussion about parallelograms, but now I need
> help.  Some textbooks (especially the older ones) have rhombii as a
> subset of kites, but the newer ones do not.  It seems like the way
> you develop the area formulas make them related. Is a rhomus a kite?
> Is a square a kite?   Any ideas?  Has it changed over the years, or
> is it just me?

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