Bonjour,
ACB: isocèle
=> CAB = CBA =54°
ACB = 180 -54 -54 => 72°
BCA : isocèle
CAB = ABC = 45°
ACB = 180 -45 -45 = > 90°
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Bonjour,
ACB: isocèle
=> CAB = CBA =54°
ACB = 180 -54 -54 => 72°
BCA : isocèle
CAB = ABC = 45°
ACB = 180 -45 -45 = > 90°