問題詳情
13. 如下圖，兩根電線杆 
與 
直立在地面上分別從頂端 A、C兩處拉繩索至底端 D、B，將它們固定，如圖所示，已知 
=12 m，繩索相交處 E 點離地面 8 m，試求 
多少公尺？
(A) 16 m
(B) 20 m
(C) 24 m
(D) 30 m
參考答案
答案：C
難度：計算中-1
書單：沒有書單，新增
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