Ответ:
BAC=Куту BCA. BCA+BCA+ABC=180, 2ABC+40=180, 2BAC=180-40, 2BAC=140, BAC=140/2, Кут BAC 70 градусов.
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Ответ:
BAC=Куту BCA. BCA+BCA+ABC=180, 2ABC+40=180, 2BAC=180-40, 2BAC=140, BAC=140/2, Кут BAC 70 градусов.