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Mathematical definitions - Trapezoid / Trapezium

 
 
Reply Mon 28 Apr, 2008 07:58 pm
Hi There,

I would be interested to know what the correct mathematical definitions are for trapezoid and trapezium. When I have looked them up on both the web and in dictionaries I am getting conflicting information. No rush on any answers, it is purely for my own curiosity.

Canoe.
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Type: Discussion • Score: 2 • Views: 3,846 • Replies: 6
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Wy
 
  1  
Reply Mon 28 Apr, 2008 08:35 pm
In British English, a trapezium is a a quadrilateral with no parallel sides (trapezoid).

In American English, the trapezium is a bone in the wrist at the base of the thumb.

Hence the conflict. I found this info at http://www.merriam-webster.com/dictionary
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canoe3154
 
  1  
Reply Tue 29 Apr, 2008 03:35 pm
post subject
Hello Wy,

Many thanks for your help.

Canoe.
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spacemanspiff1313
 
  1  
Reply Wed 30 Apr, 2008 06:31 pm
Trapezoids
A trapezoid is a quadrilateral with two sides parallel. Yea, i had it for a math test, so I know!
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Kayyam
 
  1  
Reply Thu 1 May, 2008 10:53 pm
testing 123...
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canoe3154
 
  1  
Reply Thu 1 May, 2008 11:57 pm
post subject
Hi Spacemanspiff 1313,

Thanks for that , and yes, you are correct. Trapezium is the word that causes conflict.

Canoe.
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Kayyam
 
  1  
Reply Sun 4 May, 2008 12:43 pm
There is something wrong. My posts have been deleted twice now! grrrr

We all know that this a vast left-wing and/or right-wing conspiracy to suppress the truth about trapezia! Wink

One more time...

In British usage trapezium is a synonym for trapezoid.

In American usage it is something else entirely. It is a four-sided figure that has no parallel sides. Now don't ask me why it is necessary to have a name for such a shape...

/Kayyam
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