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Mathematics, 26.07.2021 19:40 dheydar9377

Cho tam giác ABC có : AB =5; BC=12 ; AC=10 . bán kính đường tròn nội tiếp tam giác ABC bằng

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Cho tam giác ABC có : AB =5; BC=12 ; AC=10 . bán kính đường tròn nội tiếp tam giác ABC bằng...
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