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lienquanhoanganhz7
2 năm trước
Câu 1. Cho tam giác ABC vuông tại A có đường cao AH. Biết BC = 25, AB = 20. Tính diện tích tam giác ABH? A.90 B.54 C. 72 D. 96 Câu 2 .Một đa giác đều có số đo mỗi góc là 180 độ . Hỏi đa giác đó có bao nhiêu cạnh? A. 5 B.6 C. 8 D. 7 câu3 :Cho hình bình hành ABCD có diện tích bằng 160cm2. Gọi M, N lần lượt là trung điểm của BC, DC. Tính diện tích tứ giác AMCN? A.60 B. 80 C. 120 D. 100 Giúp mình với !! Có mấy câu trắc nghiệm th hà
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