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dotrongt1222
2 năm trước
Tam giác ABC vuông tại A,AB=6cm, AC=8cm , P là trung điểm của BC. Điểm Q đối xứng với P qua AB . Tứ giác APBQ là hình gì ? Vì sao . Tính Sapqb. Chúng minh Sacpq=Sabc
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