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huynhphatdat92
2 năm trước
Bài 1: Cho tam giác MNP vuông tại M, có N = 60° và MN = 8cm. Tia phân giác của góc N cắt MP tại K. Kẻ KQ vuông góc với NP tại Q. a) Chứng minh △MNK = △QNK. b) Xác định dạng của tam giác MNQ và NKP. c) Tính độ dài cạnh MQ, QP. Bài 2: Cho tam giác ABC cân tại A, A = 30° , BC = 2cm. Trên cạnh AC lấy điểm D sao cho CBD = 60° . Tính độ dài AD. P/s : Các bác giúp em với , em cần gấp ?
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