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Instructions.
Instruction pour la figure interactive: Dans l’animation, les vecteurs
\(\vec{u},\vec{v}\) et
\(\vec{w}\) sont initialement placés afin que les déterminants
\(\det(\vec{u},\vec{w})\) et
\(\det(\vec{v},\vec{w}\) soient de signes contraires. Ainsi, l’aire (géométrique) du parallélogramme engendré par
\(\vec{u}+\vec{v}\) et
\(\vec{w}\) sera, selon la propriété, la soustraction de l’aire des parallélogrammes engendrés respectivement par
\(\vec{u},\vec{w}\) et
\(\vec{v}\vec{w}\text{.}\) Suivre les indications et observer l’animation afin de visualiser l’addition des aires.
