問題詳情
3. 如右圖, 
= 50, 
= 200, ∠ADB = 60°, 且 ∠ACB = 30°, 下列選項何者正確?
(A) △BCD 為直角三角形
(B)
= 150 
(C) △BCD 的外接圓半徑 R = 150
(D)
= 50 
(E)
是 ∠ABC 的角平分線 
= 50, = 200, ∠ADB = 60°, 且 ∠ACB = 30°, 下列選項何者正確?(A) △BCD 為直角三角形
(B)
= 150 (C) △BCD 的外接圓半徑 R = 150
(D)
= 50 (E)
是 ∠ABC 的角平分線
參考答案
答案：[無官方正解]
難度：非常困難0
統計：A(0),B(0),C(0),D(0),E(1)
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