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Mathematics
Junior High
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湄
湄

不會

右圖是為邊長1的正方體,若 在4點處放一隻螞蟻,使其沿 表面爬到B點,則最短距離為 何? 解: B

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丞
丞

上面寫用「爬」的，所以不能從中間貫穿，要從平面走。平面的話就要把立體圖形攤平並用勾股定理

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