[中學] 圓的應用問題
請問這題要怎麼解?
為什麼X不是40(cm)*6(層)=240(cm)?
圖二是答本的解法,(1)X=100根號3+40 (2)(600+40π)cm
圖二
https://i.imgur.com/4NM58Ow.jpg
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