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Instructions.
On peut déplacer la droite à l’aide du point
\(A\) et du vecteur normal
\(\vec{n}\text{.}\) On peut aussi déplacer le point
\(P\text{.}\) Un clic sur « animation » fera apparaitre une décomposition du vecteur
\(\vecl{AP}\) utile pour démontrer l’affirmation.
