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38. 如下圖,L//M,N為其截線,且 分別平分∠DAB、∠CBA, ,則 = ? (A)30 (B)60 (C)90 (D)120。
問題詳情
38. 如下圖,L//M,N為其截線,且
分別平分∠DAB、∠CBA,
,則
= ?
(A)30
(B)60
(C)90
(D)120。
參考答案
答案:A
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用户評論
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】評論
∵∠CBA=∠DAN∴∠DAB+∠CBA=180⁰∵ ...
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