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missvy8888
2 năm trước
một hình thang có đáy lớn là 24cm , đáy bé là 2 phần 3 đáy lớn,chiều cao ngắn hơn đáy bé là 5cm. Tính diện tích hình thang đó. Bài 2: Một bể kính nuôi cá có dạnh hình hộp chữ nhật có chiều dài 1,2cm chiều rộng 0,5cm chiều cao là 0,6 cm. A. Tính thể tích của bể . B. Người ta đổ nước chiếm 80 phần trăm thể tích bể.Tìm chiều cao mực nước trong bể.
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