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Cho ABC vuoâng taïi A, coù ñöôøng cao AH. Goïi AM laø trung tuyeán cuûa ABC. Chöùng minh: AB. Chöùng minh: ABJ vaø ACI ñoàng daïng; BIJ vaø IHC ñoàng daïng Baøi 2. Cho ABC ñeàu.[r]
Toán 8 Hình Học [123pdf.vn] cac bài tập ve talet va tam giac dong dang them
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