Aidez moi s'il vous plaît !
BH = BD/2BD² = BC² + CD² = 230² + 230² = 2*230²BH = 230V2 / 2 = 115V2tg(ABH) = AH/BH = 147/115V2 = 0.9ABH = 42°
IH² = BH² - BI²BI = BC/2 = 115IH² = (115V2)² - 115² = 115²tg(AIH) = AH/IH = 147/115 = 1.28AIH = 52°
