@prefix psr: <http://data.loterre.fr/ark:/67375/PSR> .
@prefix skos: <http://www.w3.org/2004/02/skos/core#> .

psr:-Q8F66VZR-G
  skos:prefLabel "Lambert quadrilateral"@en, "quadrilatère de Lambert"@fr ;
  a skos:Concept ;
  skos:broader psr:-Z2Z5WNMR-Q .

psr:-XC7K2LPT-4
  skos:prefLabel "trapezoid"@en, "trapèze"@fr ;
  a skos:Concept ;
  skos:broader psr:-Z2Z5WNMR-Q .

psr:-VZHZM8NP-6
  skos:prefLabel "Bretschneider's formula"@en, "formule de Bretschneider"@fr ;
  a skos:Concept ;
  skos:related psr:-Z2Z5WNMR-Q .

psr:-BGVWMKMP-2
  skos:prefLabel "Euler line"@en, "droite d'Euler"@fr ;
  a skos:Concept ;
  skos:related psr:-Z2Z5WNMR-Q .

psr:-D2R2XB9P-G
  skos:prefLabel "cerf-volant"@fr, "kite"@en ;
  a skos:Concept ;
  skos:broader psr:-Z2Z5WNMR-Q .

psr:-BR5SB1V8-M
  skos:prefLabel "polygone"@fr, "polygon"@en ;
  a skos:Concept ;
  skos:narrower psr:-Z2Z5WNMR-Q .

psr: a skos:ConceptScheme .
psr:-Z2Z5WNMR-Q
  skos:related psr:-BGVWMKMP-2, psr:-QX8QPVSP-7, psr:-VZHZM8NP-6 ;
  skos:exactMatch <https://fr.wikipedia.org/wiki/Quadrilat%C3%A8re>, <https://en.wikipedia.org/wiki/Quadrilateral> ;
  skos:narrower psr:-XC7K2LPT-4, psr:-D2R2XB9P-G, psr:-Q8F66VZR-G ;
  skos:definition """En géométrie plane, un quadrilatère est un polygone à quatre côtés. Les trapèzes, parallélogrammes, losanges, rectangles, carrés et cerfs-volants sont des quadrilatères particuliers. 
<br/>(Wikipedia, L'Encylopédie Libre, <a href="https://fr.wikipedia.org/wiki/Quadrilat%C3%A8re">https://fr.wikipedia.org/wiki/Quadrilat%C3%A8re</a>)"""@fr, """In geometry a quadrilateral is a four-sided polygon, having four edges (sides) and four corners (vertices). The word is derived from the Latin words quadri, a variant of four, and latus, meaning "side". It is also called a tetragon, derived from Greek "tetra" meaning "four" and "gon" meaning "corner" or "angle", in analogy to other polygons (e.g. pentagon). Since "gon" means "angle", it is analogously called a quadrangle, or 4-angle. A quadrilateral with vertices <span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML"  alttext="{\\\\displaystyle A}">
    <semantics>
      <mrow class="MJX-TeXAtom-ORD">
        <mstyle displaystyle="true" scriptlevel="0">
          <mi>A</mi>
        </mstyle>
      </mrow>
      <annotation encoding="application/x-tex">{\\\\displaystyle A}</annotation>
    </semantics>
  </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/7daff47fa58cdfd29dc333def748ff5fa4c923e3" class="mwe-math-fallback-image-inline mw-invert" aria-hidden="true" style="vertical-align: -0.338ex; width:1.743ex; height:2.176ex;" alt="A"></span>, <span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML"  alttext="{\\\\displaystyle B}">
    <semantics>
      <mrow class="MJX-TeXAtom-ORD">
        <mstyle displaystyle="true" scriptlevel="0">
          <mi>B</mi>
        </mstyle>
      </mrow>
      <annotation encoding="application/x-tex">{\\\\displaystyle B}</annotation>
    </semantics>
  </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/47136aad860d145f75f3eed3022df827cee94d7a" class="mwe-math-fallback-image-inline mw-invert" aria-hidden="true" style="vertical-align: -0.338ex; width:1.764ex; height:2.176ex;" alt="B"></span>, <span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML"  alttext="{\\\\displaystyle C}">
    <semantics>
      <mrow class="MJX-TeXAtom-ORD">
        <mstyle displaystyle="true" scriptlevel="0">
          <mi>C</mi>
        </mstyle>
      </mrow>
      <annotation encoding="application/x-tex">{\\\\displaystyle C}</annotation>
    </semantics>
  </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/4fc55753007cd3c18576f7933f6f089196732029" class="mwe-math-fallback-image-inline mw-invert" aria-hidden="true" style="vertical-align: -0.338ex; width:1.766ex; height:2.176ex;" alt="C"></span> and <span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML"  alttext="{\\\\displaystyle D}">
    <semantics>
      <mrow class="MJX-TeXAtom-ORD">
        <mstyle displaystyle="true" scriptlevel="0">
          <mi>D</mi>
        </mstyle>
      </mrow>
      <annotation encoding="application/x-tex">{\\\\displaystyle D}</annotation>
    </semantics>
  </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/f34a0c600395e5d4345287e21fb26efd386990e6" class="mwe-math-fallback-image-inline mw-invert" aria-hidden="true" style="vertical-align: -0.338ex; width:1.924ex; height:2.176ex;" alt="D"></span> is sometimes denoted as <span class="mwe-math-element"><span class="mwe-math-mathml-inline mwe-math-mathml-a11y" style="display: none;"><math xmlns="http://www.w3.org/1998/Math/MathML"  alttext="{\\\\displaystyle \\\\square ABCD}">
    <semantics>
      <mrow class="MJX-TeXAtom-ORD">
        <mstyle displaystyle="true" scriptlevel="0">
          <mi>◻<!-- ◻ --></mi>
          <mi>A</mi>
          <mi>B</mi>
          <mi>C</mi>
          <mi>D</mi>
        </mstyle>
      </mrow>
      <annotation encoding="application/x-tex">{\\\\displaystyle \\\\square ABCD}</annotation>
    </semantics>
  </math></span><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/83f54153304ec3963272dedf0701611bf6633aeb" class="mwe-math-fallback-image-inline mw-invert" aria-hidden="true" style="vertical-align: -0.338ex; width:9.006ex; height:2.176ex;" alt="{\\\\displaystyle \\\\square ABCD}"></span>.
<br/>(Wikipedia, The Free Encyclopedia, <a href="https://en.wikipedia.org/wiki/Quadrilateral">https://en.wikipedia.org/wiki/Quadrilateral</a>)"""@en ;
  skos:inScheme psr: ;
  skos:broader psr:-BR5SB1V8-M ;
  a skos:Concept ;
  skos:prefLabel "quadrilateral"@en, "quadrilatère"@fr .

psr:-QX8QPVSP-7
  skos:prefLabel "Newton line"@en, "droite de Newton"@fr ;
  a skos:Concept ;
  skos:related psr:-Z2Z5WNMR-Q .