User talk:Circlesareround

Hi, Circlesareround, and welcome to Wikipedia! I really like your recent edits on quadrilaterals, and I hope you will contribute a lot more to Wikipedia. Duoduoduo (talk) 14:24, 13 August 2011 (UTC)

Thank you for your kind words. Circlesareround (talk) 22:30, 13 August 2011 (UTC)

list of circle topics
Hello.

I have added Tangential quadrilateral and Bicentric quadrilateral to the list of circle topics. If you know of others that should be there and are not, could you add those too? Michael Hardy (talk) 23:32, 14 August 2011 (UTC)


 * Today I added Ex-tangential quadrilateral. Circlesareround (talk) 18:06, 19 August 2011 (UTC)

K for area
I suppose any letter of the English or Greek or any other alphabet will serve, but I'm curious as to why you prefer "K" rather than "A" for area.  D b f i r s   07:46, 10 September 2011 (UTC)


 * Since the vertices of a quadrilateral is almost always denoted A, B, C, D it is preferable to use another letter for the area, since some of the area formulas include the angle A. So why K? It is a good question. Many geometry books use it (for instance the famous "Geometry Revisited" by Coxeter and Greitzer), but I do not know why they have chosen this letter. Circlesareround (talk) 08:03, 10 September 2011 (UTC)


 * Thanks for the source. I haven't seen K used on this side of the pond.  An alternative would be to avoid introducing an additional variable and simply have "Area = ...", but it's clear either way.    D b f i r s   08:48, 10 September 2011 (UTC)

Disphenoids
Thanks for correcting the definition. —Mark Dominus (talk) 15:39, 4 January 2012 (UTC)

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 * Tetrahedron (check to confirm | fix with Dab solver)
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 * Trirectangular tetrahedron (check to confirm | fix with Dab solver)
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Tangential polygon stub
Hi, I hope you can expand on my stub Tangential polygon. Thanks. Duoduoduo (talk) 18:54, 16 April 2012 (UTC)

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 * Cyclic quadrilateral (check to confirm | fix with Dab solver)
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 * Quadrilateral (check to confirm | fix with Dab solver)
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Is this edit right?
Just in case it's not on your watchlist, could you check if this edit is correct? Thanks. Duoduoduo (talk) 22:40, 15 May 2012 (UTC)

I'm not sure how this duality is defined. My spontaneous thought was: does it matter? I think it could be either way, but I don't know. Circlesareround (talk) 07:35, 17 May 2012 (UTC)

Newton line
Hi!

Please see Talk:Newton_line.

Regards,

--Kmhkmh (talk) 23:37, 1 March 2014 (UTC)

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