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Talk:Quadrilateral

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This is an old revision of this page, as edited by Olof (talk | contribs) at 03:37, 11 March 2002 (british vs. american). The present address (URL) is a permanent link to this revision, which may differ significantly from the current revision.

I could have sworn that the two sides parallel ones are called "trapezoids". --BlackGriffen

And you would have been right. I've made the change. Vicki Rosenzweig

The article thus far lists only cyclic quadrilaterals; can someone who's done geometry within the last 20 years fix this? Vicki Rosenzweig (yes, me again)

The trapezoid is three dimensional.

--- Karl Palmen

I've always known a trapezoid to be two dimensional, and Trapezium to be a trapezoidal object associated with astronomy. -- Olof
Wolfram's MathWorld gives: "There are two common definitions of the trapezium. The American definition is a quadrilateral with no parallel sides. The British definition for a trapezium is a quadrilateral with two sides parallel." -- Olof
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