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Mathematics, 21.07.2021 22:20 sreyasusanbinu

Câu 1: Trong các mệnh đề sau, mệnh đề nào là không đúng ? A. Nếu a // b và (α) vuông góc a thì (α) vuông góc với b

B. Nếu (α) // (β) và a vuông góc với (α) thì a vuông góc với (β)

C. Nếu a và b là hai đường thẳng phân biệt và a vuông góc (α), b vuông góc với (α) thì a // b

D. Nếu a // (α) và b vuông góc a thì b vuông góc (α)

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Câu 1: Trong các mệnh đề sau, mệnh đề nào là không đúng ? A. Nếu a // b và (α) vuông góc a thì (α)...
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