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№1
на рисунке 18 прямые a, b и с пересечены прямои с
42°, 22 = 140°, 23 = 138°. Какие из прямых а, о,
21 = 42°, 22 = 14оо
параллельны?
№2
Найдите все углы, образованные при пересечении двух
аллельных прямых а и всекущей с, если:
один из углов равен 150.

kirillovae945

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