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duongvulong882002
2 năm trước
Bài 1.Cho tam giác MNP có góc M=90 độ;NP=15cm;MN=12cm a)Tính MP Kẻ MK⊥NP (E ∈ BC).Chứng minh AM=EC Bài 4.Cho tam giác ABC có góc A=90 độ.Kẻ p/giác BD của góc B (D ∈ AC).Kẻ DE ⊥BC (E ∈ BD) a) CM:Tam giác BAD = tam giác BED b) Tia ED cắt tia BA tại M.CM:AM=EC c) CM : Tam giác BMC là tam giác cân d) CM: AE//MC
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