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Topic: Classification of quadrilaterals
Replies: 17   Last Post: Jan 11, 1995 6:43 AM

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W Gary Martin

Posts: 80
Registered: 12/6/04
Re: Classification of quadrilaterals
Posted: Dec 16, 1994 9:54 AM
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Perfect! I prefer this to the "usual" US classification which puts trap's
over on the side unconnected to the others. In fact, p'grams do inherit all
the (admittedly few) properties of a trap, and a rectangle inherits all the
properties of an iso. trap. So why do so many texts take an exclusionary
viewpoint? g.

>Here is a classification scheme found in "A Problem Solving Approach to
>Mathematics for Elementary School Teachers" by Billstein et al.
>
> Quadrilateral
> / \
> / \
> Kite Trapezoid
> | / \
> | / Isosceles
> | Parallelogram
> | / \ Trapezoid
> | / \ /
> \ / \ /
> Rhombus Rectangle
> \ /
> \ /
> \ /
> Square
>
>Any Comments?
>
>Tad Watanabe
>Towson State University
>Towson, Maryland


============================================================
W. Gary Martin 1776 University Ave.
University of Hawaii Honolulu, HI 96822
Curriculum R & D Group (808)956-9956; FAX (808)956-4984








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