ଚତୁର୍ଭୁଜ ନିମନ୍ତେ ଆଧାର ଦେଖିବେ

{{ଛୋଟ|Quadrilateral}}
{{about|ଜ୍ୟାମିତିକି ଆକାର|}}
{{Infobox Polygon
| name        = Quadrilateral
| image       = Six Quadrilaterals.svg
| caption     = Six different types of quadrilaterals
| edges       = 4
| schläfli    = {4} (for square)
| area        = various methods;<br>[[#Area of a convex quadrilateral|see below]]
| angle       = 90° (for square and rectangle)}}

[[ଯୁକ୍ଲିଡୀୟ ଜ୍ୟାମିତି]] ଅନୁସାରେ '''ଚତୁର୍ଭୁଜ''' ହେଉଛି, ଚାରି 'ବାହୁ' ଓ ଚାରି 'କୋଣ' ଥିବା ଏକ [[ବହୁଭୂଜ]] । ଏହା [[ସରଳ ବହୁଭୂଜ|ସରଳ]] (କୌଣସି ବାହୁ ପରସ୍ପରକୁ ଛେଦ କରିନଥାନ୍ତି) କିମ୍ବା [[ଜଟିଳ ବହୁଭୂଜ|ଜଟିଳ]] (କୌଣସି ଦୁଇ ବାହୁ ପରସ୍ପରକୁ ଛେଦ କରିଥାନ୍ତି)  ହେଇପାରେ । ସରଳ ଚତୁର୍ଭୁଜ, [[ଉତ୍ତଳ ବହୁଭୂଜ|ଉତ୍ତଳ]] କିମ୍ବା [[ଅବତଳ ବହୁଭୂଜ|ଅବତଳ]] ହେଇପାରେ ।  

ଏହାର ଚାରି କୋଣର ସମଷ୍ଟି: <math>\angle A+\angle B+\angle C+\angle D=360^{\circ}.</math>

==ଉତ୍ତଳ ଚତୁର୍ଭୁଜ==

==ଅବତଳ ଚତୁର୍ଭୁଜ==
==ଗାଣିତିକ ସମାଧାନ==

==ଆଧାର==
{{ଆଧାର}}

==ବାହାର ଲିଙ୍କ==
{{Commons category|Tetragons}}
*{{MathWorld |urlname=Quadrilateral |title=Quadrilateral}}
*[http://www.chrisvantienhoven.nl/mathematics/encyclopedia.html Encyclopedia of Quadri-Figures] by Chris Van Tienhoven
*[http://www.vias.org/comp_geometry/geom_quad_general.html Compendium Geometry] Analytic Geometry of Quadrilaterals
*[http://www.cut-the-knot.org/Curriculum/Geometry/PerpBisectQuadri.shtml Quadrilaterals Formed by Perpendicular Bisectors], [http://www.cut-the-knot.org/Curriculum/Geometry/ProjectiveQuadri.shtml Projective Collinearity] and  [http://www.cut-the-knot.org/Curriculum/Geometry/Quadrilaterals.shtml Interactive Classification] of Quadrilaterals from [[cut-the-knot]]
*[http://www.mathopenref.com/tocs/quadrilateraltoc.html Definitions and examples of quadrilaterals] and [http://www.mathopenref.com/tetragon.html Definition and properties of tetragons] from Mathopenref
*[http://dynamicmathematicslearning.com/quad-tree-web.html A (dynamic) Hierarchical Quadrilateral Tree] at [http://dynamicmathematicslearning.com/JavaGSPLinks.htm Dynamic Geometry Sketches]
*[http://mysite.mweb.co.za/residents/profmd/quadclassify.pdf An extended classification of quadrilaterals] {{Webarchive|url=https://web.archive.org/web/20191230004754/http://mysite.mweb.co.za/residents/profmd/quadclassify.pdf |date=2019-12-30 }} at [http://mysite.mweb.co.za/residents/profmd/homepage4.html Dynamic Math Learning Homepage] {{Webarchive|url=https://web.archive.org/web/20180825150046/http://mysite.mweb.co.za/residents/profmd/homepage4.html |date=2018-08-25 }}
*[http://comic.socksandpuppets.com/view.php?date=2008-02-08 Quadrilateral Venn Diagram] {{Webarchive|url=https://web.archive.org/web/20110907024856/http://comic.socksandpuppets.com/view.php?date=2008-02-08 |date=2011-09-07 }} Quadrilaterals expressed in the form of a Venn diagram, where the areas are also the shape of the quadrilateral they describe.
*[http://mzone.mweb.co.za/residents/profmd/classify.pdf The role and function of a hierarchical classification of quadrilaterals] {{Webarchive|url=https://web.archive.org/web/20110719175018/http://mzone.mweb.co.za/residents/profmd/classify.pdf |date=2011-07-19 }} by Michael de Villiers

{{ବହୁଭୂଜ}}

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