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There could be tangential quadrilaterals which are also trapezoids. No? -- 203.186.238.243 9 July 2005 16:02 (UTC)
Shouldn't the isosceles trapezoid be between the trapezoid and parallelogram instead of between the trapezoid and the rectangle to be fully inclusive? An isosceles trapezoid has one+ pair of parallel sides and one+ pair of congruent sides, so wouldn't that all be inherited by a parallelogram? -- Rockychat3 ( talk) 02:58, 4 March 2014 (UTC)
The cell for whether an isosceles trapezoid has perpendicular diagonals says "Not in general", but the cell for whether a kite has congruent diagonals, which this same phrase fits equally, says "No". Any thoughts?? Georgia guy ( talk) 20:58, 29 March 2013 (UTC)
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Is there a reason why we don't use the word quadragon instead of quadrilateral? After all it has the same meaning as hexagon (hex meaning 6) or pentagon (penta meaning 5)
So quadragon (quad meaning 4) should have some sense. — Preceding unsigned comment added by 185.69.145.97 ( talk) 12:48, 2 September 2016 (UTC)
David Eppstein, I was born and bred in the UK and English is my first language. Please don't ever insult me again. — Preceding unsigned comment added by 77.97.245.229 ( talk) 22:49, 16 November 2016 (UTC)
If thats the case then why don't we call a triangle a 'trilateral' or a hexagon a 'hexalateral'? — Preceding unsigned comment added by 77.97.245.229 ( talk) 23:36, 30 September 2016 (UTC)
David Eppstein, I have known since I was a child that 'quadrangle' is an alternative name for 'quadrilateral'. Please do not take me for an idiot. — Preceding unsigned comment added by 77.97.245.229 ( talk) 22:53, 16 November 2016 (UTC)
I editted them.Could you check if it is right?The area of the Varignon parallelogram equals half the area of the original quadrilateral. This is true in convex, concave and crossed quadrilaterals provided the area of the latter is defined to be the difference of the areas of the two triangles it is composed of.
/info/en/?search=Bretschneider%27s_formula
Sorry,I misunderstanded a part.It was right about the part.
https://en.wikipedia.org/?title=Quadrilateral&diff=1072455009&oldid=1072428222 ,and I editted a new part.this article's trigonometric formulas Couldn't it simplify like this?And I undid the not-organized part.--
240D:1E:309:5F00:77B:76BC:5AAE:498E (
talk) 03:24, 20 February 2022 (UTC)
This is the
talk page for discussing improvements to the
Quadrilateral article. This is not a forum for general discussion of the article's subject. |
Article policies
|
Find sources: Google ( books · news · scholar · free images · WP refs) · FENS · JSTOR · TWL |
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1Auto-archiving period: 700 days
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There could be tangential quadrilaterals which are also trapezoids. No? -- 203.186.238.243 9 July 2005 16:02 (UTC)
Shouldn't the isosceles trapezoid be between the trapezoid and parallelogram instead of between the trapezoid and the rectangle to be fully inclusive? An isosceles trapezoid has one+ pair of parallel sides and one+ pair of congruent sides, so wouldn't that all be inherited by a parallelogram? -- Rockychat3 ( talk) 02:58, 4 March 2014 (UTC)
The cell for whether an isosceles trapezoid has perpendicular diagonals says "Not in general", but the cell for whether a kite has congruent diagonals, which this same phrase fits equally, says "No". Any thoughts?? Georgia guy ( talk) 20:58, 29 March 2013 (UTC)
Hello fellow Wikipedians,
I have just modified 3 external links on Quadrilateral. Please take a moment to review my edit. If you have any questions, or need the bot to ignore the links, or the page altogether, please visit this simple FaQ for additional information. I made the following changes:
When you have finished reviewing my changes, please set the checked parameter below to true or failed to let others know (documentation at {{
Sourcecheck}}
).
This message was posted before February 2018.
After February 2018, "External links modified" talk page sections are no longer generated or monitored by InternetArchiveBot. No special action is required regarding these talk page notices, other than
regular verification using the archive tool instructions below. Editors
have permission to delete these "External links modified" talk page sections if they want to de-clutter talk pages, but see the
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source check}}
(last update: 5 June 2024).
Cheers.— InternetArchiveBot ( Report bug) 12:11, 21 July 2016 (UTC)
Is there a reason why we don't use the word quadragon instead of quadrilateral? After all it has the same meaning as hexagon (hex meaning 6) or pentagon (penta meaning 5)
So quadragon (quad meaning 4) should have some sense. — Preceding unsigned comment added by 185.69.145.97 ( talk) 12:48, 2 September 2016 (UTC)
David Eppstein, I was born and bred in the UK and English is my first language. Please don't ever insult me again. — Preceding unsigned comment added by 77.97.245.229 ( talk) 22:49, 16 November 2016 (UTC)
If thats the case then why don't we call a triangle a 'trilateral' or a hexagon a 'hexalateral'? — Preceding unsigned comment added by 77.97.245.229 ( talk) 23:36, 30 September 2016 (UTC)
David Eppstein, I have known since I was a child that 'quadrangle' is an alternative name for 'quadrilateral'. Please do not take me for an idiot. — Preceding unsigned comment added by 77.97.245.229 ( talk) 22:53, 16 November 2016 (UTC)
I editted them.Could you check if it is right?The area of the Varignon parallelogram equals half the area of the original quadrilateral. This is true in convex, concave and crossed quadrilaterals provided the area of the latter is defined to be the difference of the areas of the two triangles it is composed of.
/info/en/?search=Bretschneider%27s_formula
Sorry,I misunderstanded a part.It was right about the part.
https://en.wikipedia.org/?title=Quadrilateral&diff=1072455009&oldid=1072428222 ,and I editted a new part.this article's trigonometric formulas Couldn't it simplify like this?And I undid the not-organized part.--
240D:1E:309:5F00:77B:76BC:5AAE:498E (
talk) 03:24, 20 February 2022 (UTC)