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nguyenanhttm
2 năm trước
Cho tam giac ABC vuong tai A duong cao AH biet AB=3cm,AC=4cm a) Tinh BC,AH,BH,CH b) Goi M,N thu tu la hinh chieu cua H tren AB va AC . chung minh MN=AH va tinh MN c) Chung minh AM.AB=AN.AC -Giup minh nhe -
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