Feat: correction de l'exercice 9
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@ -280,7 +280,6 @@
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\begin{exercise}[subtitle={Bilan sur distance entre deux points}, step={2}, origin={dMeedC}, topics={Géométrie repérée}, tags={Coordonnées, distance}, mode={\faIcon{users}}]
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Proposer une formule pour calculer le distance entre deux points du plan. Vous illustrerez la formule avec un dessin et vous l'appliquerez à un exemple de votre choix.
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\end{exercise}
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\begin{exercise}[subtitle={Exercice technique}, step={2}, origin={dMeedC}, topics={Géométrie repérée}, tags={Coordonnées, distance}, mode={\faIcon{tools}}]
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@ -292,15 +291,64 @@
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\end{enumerate}
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\end{exercise}
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\begin{solution}
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\begin{enumerate}
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\item ~
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\begin{tikzpicture}
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\repere{-5}{4}{-4}{4}
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\draw (3, -2) node {x} node [below left] {$M$};
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\draw (-2, -3) node {x} node [below left] {$N$};
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\draw (-4, 3) node {x} node [below left] {$P$};
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\end{tikzpicture}
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\item
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Distance $MN$
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\[
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MN = \sqrt{\left(3 - (-2)\right)^2 + \left( -2 - (-3)\right)} = \sqrt{5^2 + 1^2} = \sqrt{25 + 1} = \sqrt{26}
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\]
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Distance $MP$
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\[
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MP = \sqrt{\left(3 - (-4)\right)^2 + \left( -2 - 3\right)} = \sqrt{7^2 + (-5)^2} = \sqrt{49 + 25} = \sqrt{74}
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\]
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Distance $NP$
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\[
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NP = \sqrt{\left(-2 - (-4)\right)^2 + \left( -3 - 3\right)} = \sqrt{2^2 + (-6)^2} = \sqrt{4 + 36} = \sqrt{40}
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\]
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\item On sait que $NM = \sqrt{26}$, $MP = \sqrt{74}$ et $NP = \sqrt{40}$
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Or
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\[
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NM^2 + NP^2 = \sqrt{26}^2 + \sqrt{40}^2 = 26 + 40 = 76 \qquad \qquad MP^2 = \sqrt{74}^2 = 74
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\]
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Donc $NM^2 + NP^2 \neq MP^2$
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Donc d'après le théorème de Pythagore le triangle $MNP$ n'est pas un triangle rectangle.
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\end{enumerate}
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\end{solution}
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\begin{exercise}[subtitle={Quadrilatère}, step={2}, origin={Sesamath 60p125}, topics={Géométrie Repérée}, tags={Coordonnées, distance}, mode={\faIcon{tools}}]
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On considère les points $A(1; 2)$, $B(-6; 3)$, $C(6;7)$ et $D(-1; 8)$.
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Déterminer la nature du quadrilatère $BACD$.
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\end{exercise}
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\begin{solution}
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\begin{tikzpicture}
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\repere{-7}{7}{0}{9}
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\draw (1, 2) node {x} node [below left] {$A$};
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\draw (-6, 3) node {x} node [below left] {$B$};
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\draw (6, 7) node {x} node [below left] {$C$};
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\draw (-1, 8) node {x} node [below left] {$D$};
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\end{tikzpicture}
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On a l'impression que le quadrilatère est un losange. Pour le démontrer on va calculer la longueur de ses côtés.
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\end{solution}
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% ---- étape 3
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\begin{exercise}[subtitle={BEAU triangle}, step={3}, origin={dMeedC}, topics={Géométrie repérée}, tags={Coordonnées, milieu, distance}, mode={\faIcon{tools}}]
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\begin{exercise}[subtitle={BEAU rectangle}, step={3}, origin={dMeedC}, topics={Géométrie repérée}, tags={Coordonnées, milieu, distance}, mode={\faIcon{tools}}]
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Soit $B(3; 2)$, $E(-1; -2)$, $A(-3; 0)$ et $U(1; 4)$ quatre points du plan.
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\begin{enumerate}
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\item Calculer les coordonnées du milieu de $[BA]$
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@ -12,7 +12,6 @@
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\xsimsetup{
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exercise/print=false,
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solution/print=true,
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}
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\pagestyle{empty}
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@ -231,9 +231,11 @@
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\draw[->, very thick] (#1,0) -- (#2,0);
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\draw[->, very thick] (0,#3) -- (0,#4);
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\draw (0,0) node[below left] {$O$};
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\draw [->] (0,0) -- (0,1) node[left] {$J$};
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\draw [->] (0,0) -- (1,0) node[below] {$I$};
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%\draw (1,0) node[rotate=90] {-} node[below] {$I$};
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\draw (1, 0) node [below left] {1};
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\draw (0, 1) node [below left] {1};
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% \draw [->] (0,0) -- (0,1) node[left] {$J$};
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% \draw [->] (0,0) -- (1,0) node[below] {$I$};
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% \draw (1,0) node[rotate=90] {-} node[below] {$I$};
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}
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\newcommand{\repereNoGrid}[4]%
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{%
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