Toán Lớp 6: hinh chu nhat co chieu rong bang 30cm,chieu dai gap 3 lan chieu rong.dien tich hinh chu nhat do bang:
A.90cm^2 B.270cm^2 C.2700cm^2 D.9000cm^2
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Toán Lớp 6: hinh chu nhat co chieu rong bang 30cm,chieu dai gap 3 lan chieu rong.dien tich hinh chu nhat do bang:
A.90cm^2 B.270cm^2 C.2700cm^2 D.9000cm^2
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