File:P20080604-fig01.png
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中文(繁體):圖為一打開 60° 的扇形,O 為圓心,半徑為 r,若 P 為位在 AB 弧上的一點,並且作垂直線段到扇形的兩邊,長度分別為 a 與 b ,那麼如何利用 a 與 b 計算出 r ? |
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Author | PegasusRoe |
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current | 09:17, 4 June 2008 | 169 × 142 (4 KB) | PegasusRoe (talk | contribs) | {{Information |Description={{zh-hant|1=圖為一打開 60° 的扇形,O 為圓心,半徑為 r,若 P 為位在 AB 弧上的一點,並且作垂直線段到扇形的兩邊,長度分別為 a 與 b ,那麼如何利用 a 與 b 計算出 r ?}} |Sou |
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