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Khuee2786
2 năm trước
cho hinh thoi ABCD có AC = 10 cm, BD = 6 cm. goi e,f,g,h lan luot la trung diem cua AB,BC,CD,DA. a) tu giac EFGH la hinh gi ? vi sao? b) tinh dien tich hinh thoi ABCD. c)tinh dien tich hinh tu giac EFGH
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