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beotv8888
2 năm trước
cho tam giác ABC vuông cân ở A, biết AB=AC=4cm a)Tính BC b)Từ A kẻ đường thẳng vuông góc với BC tại D. Chứng minh D là trung điểm của BC c)từ D kẻ DE vuông góc với AC. Chứng minh tam giác AED la ftam giác vuông cân d)Tính AD vẽ hình luôn cho mình cái nha !!!
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