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cho hinh thang ABCD co kich thuoc nhu hinh ve ben, tinh:a) dien tich hinh thang ABCDb) dien tich hinh tam giac BEC A B C E H D 24cm 10cm 36cm...
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cho hinh thang ABCD co kich thuoc nhu hinh ve ben, tinh:

a) dien tich hinh thang ABCD

b) dien tich hinh tam giac BEC

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