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Ответ

Автор - himasha13

Ответ: 35°

∠ALB=180°-138°=42°(сумма смежных углов равна 180°)

из ΔABL ∠BAL=180°-(131°+42°)=7°

Т.к. AL- биссектриса, то ∠BAC=7°*2=14°

Из ΔABC ∠ACB=180°-(131°+14°)=35°

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