Tính diện tích mảnh đất có kích thước theo hình vẽ dưới đây :
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diện tích của sân diễn là:
6,5 x 6,5 x 3,14 = 132,665 [m2]
Đ/s : 132,665 m2
ko có hình chứng tỏ mảnh đất đó ko tồn tại nên diện tích của mảnh đất đó la 2 = 0 m2
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hình vẽ đâu bạn ơi