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            <Attribute name="description">On calcule l&#39;aire d&#39;une boîte de céréales en forme de pavé droit  en utilisant la formule : Aire totale = 2×L×l+  2×L×h+2×l×h, où L est la longueur, l la largeur et h la hauteur. L&#39;aire totale est égale à la somme des aires des 6 faces.</Attribute>
            
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            <video:description>On calcule l&#39;aire d&#39;une boîte de céréales en forme de pavé droit  en utilisant la formule : Aire totale = 2×L×l+  2×L×h+2×l×h, où L est la longueur, l la largeur et h la hauteur. L&#39;aire totale est égale à la somme des aires des 6 faces.</video:description>
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