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某扇形圓心角為平角~周常為25.7公分求扇形面積
Jan 16th 2014, 09:54

知識問題|

發問者: mandy ( 初學者 5 級)
發問時間: 2014-01-16 17:54:46 ( 還有 4 天投票到期 )
解答贈點: 5 ( 共有 0 人贊助 )
候選回答: 2 0 0

某扇形圓心角為平角~周常為25.7公分求扇形面積

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