Toán Lớp 7: cho a // b , c cắt b thì :
A. c//a B. c cắt a C . c vuông góc vs a D . c trùng a
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Toán Lớp 7: cho a // b , c cắt b thì :
A. c//a B. c cắt a C . c vuông góc vs a D . c trùng a
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