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2023-08-08 10:15:52
cụ thể cách giải là gì bạn
2022-08-11 10:13:30
2022-04-27 21:23:45
bán kính hình tròn là:
26,376:2:3,14=4,2
dt hình tròn là :
4,2x4,2x3,14=55.3896(dm2)
đáp số :55,3896 dm2