January 2021 0 73 Report
Merci de votre aide 1)On donne un triangle ABC isocèle en B tel que l'angle ABC=120° et AB=6cm
On a (BI) hauteur relative a [AC]
a) Justifier que l'angle ABI = 60°
b)Calculer BI

Développer et réduire (X= la lettre)
A=(3X-6)(3X + 1)-2X (7X+4)-6(5X²-3X+2)
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