問題詳情
14. 如圖，有兩個同心圓，A、B、C在大圓上， 
分別交小圓於D、E，若 
＝60°，則∠ACB的度數為何？
(A)15°
(B)30°
(C)60°
(D)120°
參考答案
答案：[無官方正解]
難度：計算中-1
書單：沒有書單，新增
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