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shicitt2002
2 năm trước
Cho tam giác ABC vuông tại A, đường cao AH. Biết AB = 6 cm; BC = 10 cm. a) Tính AC, AH b) Gọi E, F lần lượt là hình chiếu của H lên AB, AC. Chứng minh rằng: AE.BE + AF.FC =BH.HC c) Chứng minh rằng: $\frac{EB}{FC}$ = ($\frac{AB}{AC}$)$^{3}$ CHỈ LÀM CÂU C!!!
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