Mathematics, 09.09.2021 08:30, jlayne0605

Ví dụ 3: a) Cho điểm A nằm ngoài đường thẳng d. Qua A vẽ đường thẳng b sao cho b vuông góc với a tại M. Em vẽ được bao nhiêu đường thằng qua A và vuông góc với đường thẳng A
b) Lấy A’ sao cho M là trung điểm của AA’

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Ví dụ 3: a) Cho điểm A nằm ngoài đường thẳng d. Qua A vẽ đường thẳng b sao cho b vuông góc với a t...