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寒雪飛翔100,你好: 一個圓柱體底面半徑是6釐米,高是10釐米,它的側面展開圖是(長方)形,這個展開圖的: 周長是:2×(2×3.14×6+10)=95.36(釐米) 面積是:2×3.14×6×10=376.8(平方釐米)
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