問題詳情
5. 如圖， 已知∠1＝115°、∠2＝75°、∠3＝100°、∠4＝20°、∠5＝55°， 求∠6＝？
(A)125°
(B)135°
(C)145°
(D)155°
參考答案
無參考答案
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