問題詳情
17. 如圖 ( 七 )，圓 O 與正方形 ABCD 的兩邊 
相切，且 
與圓 O 相切於 E 點。若圓 O 的半徑為 5，且 
= 11，則 
的長度為何？
(A) 5
(B) 6
(C) √30
(D) 11/2
參考答案
無參考答案
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