Mathematics, 22.07.2021 14:00, livleluve76

Xem hình vẽ dưới đây, chứng tỏ AB song song với CD. Biết góc BAE=130 độ,góc AEF =50 độ,FEC=60 độ,BCD= 120 độ

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Xem hình vẽ dưới đây, chứng tỏ AB song song với CD. Biết góc BAE=130 độ,góc AEF =50 độ,FEC=60 độ,BCD...