問題詳情
5.如圖, 
分別切圓O於B點與C點,且∠BAC=30°， 則∠BAC+∠BOC= ? 
(A)180°
(B)150°
(C)120°
(D)90°
參考答案
答案：A
難度：計算中-1
書單：沒有書單，新增
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