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            <video:description>Connaissant l&#39;aire d&#39;un parallélogramme et la longueur de sa base, déterminer la valeur de la hauteur. Pour cela, on se rappelle que l&#39;aire d&#39;un parallélogramme est égale au produit de la longueur d&#39;un côté par la hauteur relative à ce côté. Si l&#39;aire est égale à 24 unités d&#39;aire et la base à 6 unités, alors la hauteur est  égale 4 unités. Facile !</video:description>
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            <video:description>On sait que la formule de  l&#39;aire d&#39;un parallélogramme est A =  base × hauteur. En choisissant la base comme l&#39;un des côtés du parallélogramme, la hauteur est la droite perpendiculaire à la base passant par un sommet du côté opposé à la base. Donc, si la base est égale à 12 unités et la hauteur à 4 unités, l&#39;aire est égale à 48 unités carrées.</video:description>
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            <video:description>L&#39;aire d&#39;un trapèze est donnée par la formule A=(a+b)x h/2.  Pour calculer l&#39;aire d&#39;un trapèze, vous devez connaître la longueur des deux côtés parallèles (les bases) et la hauteur. Additionnez les longueurs des deux bases, puis multipliez par la hauteur. Enfin, divisez par 2.</video:description>
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        <lastmod>2024-07-08T13:23:54.498043911Z</lastmod>
        
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            <video:title>Aire d&#39;un cerf-volant</video:title>
            <video:description>L&#39;aire d&#39;un cerf-volant est égale au demi-produit des longueurs de ses diagonales. Pour calculer l&#39;aire d&#39;un cerf-volant, vous devez connaître la longueur de ses diagonales, multipliez les longueurs des deux diagonales. Enfin, divisez par 2.</video:description>
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            <video:category>Calculs d&amp;#39;aires de polygones (figures simples)</video:category>
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