問題詳情
3. ( )如圖，△ABC中，以B為圓心， 
長為半徑畫弧，分別交 
於D、E兩點，並連接 
。若∠A＝30°， 
，則∠BDE的度數為何？
(A)
(B) 52.
(C) 67.
(D) 75 
參考答案
無參考答案
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