December 2020 0 86 Report
Exercice 2 Soit ABC un triangle dont les longueurs des côtés, en centimètre, sont indiquées
ci-dessous.
AC: 2x+1
CB: 6x-8
BA: 6cm
1. Expliquer pourquoi ce triangle est isocèle en A pour x = 2,5.
2. Exprimer en fonction de x le périmètre de ce triangle.
Donner le résultat simplifié.
3. Déterminer la valeur de x pour laquelle le triangle est isocèle en C.
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