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huydeptrai2018
2 năm trước
Cho Δ ABC, ∠A = 90°, AH ⊥ BC (H ϵ BC) ,AB = 6cm , AC = 8cm. a) Tính BC,HA,HB,HC b) Tia phân giác ∠BAC cắt BC tại D.Tính diện tích ABD
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