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Phạm Kim Ngân
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2022-06-03 13:22:13
Sông Mê Công và Đồng Nai chọn C
2022-06-03 12:18:14
2022-05-13 12:16:27
2022-05-12 19:57:46
2022-05-12 19:55:53
2022-05-12 19:54:28
2022-05-12 19:52:48
2022-05-10 20:48:37
C nhé bạn
2022-05-10 20:37:25
đáp án D.\(\dfrac{1}{2}\)
2022-05-10 20:29:58
Đổi 3dm = 30cm
Chu vi của hình chữ nhật là:
(30 + 9) x 2 = 78 (cm)
Diện tích của hình chữ nhật là:
30 x 9 = 270 (cm2)
Đáp số: Chu vi: 78cm
Diện tích: 270cm2