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nguyendanghaiduonglop92
2 năm trước
cho tam giác ABC có CA = CB =10 cm , AB = 12 cm . Kẻ CI vuông góc với AB ( I thuộc AB) A) CM : IA = IB B) TÍNH ĐỘ DÀI IC C) Kẻ IH vuông góc với AC ( H thuộc AC ) , kẻ ik vuông góc với BC ( K thuộc BC ) SO SÁNH CÁC ĐỘ DÀI IH VÀ IK
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