Объяснение:
1)KAB+KBA=180°-130°=50°
2)ACB=180°-2(KAB+KBA)=180°-100°=80°
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Объяснение:
1)KAB+KBA=180°-130°=50°
2)ACB=180°-2(KAB+KBA)=180°-100°=80°