4 thoughts on “Sách Hình học của Mathscope”

  3. Thây giup em bai nay duoc khong a? Cho tam giác ABC có góc BAC =135 do,AM,BN la cac duong Cao ,duong thang MN cat duong trung truc AC tai P, goi D va E lan luot la trung diem NP va BC,Chung Minh rang tam giac ADE Vuong can!

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