仔仔將長方形便條紙沿著折疊，如圖，若∠1＝75°，則∠2＝？ (A)75°　(B)60°　(C)30°　(D)15°

問題詳情

19.仔仔將長方形便條紙沿著折疊，如圖，若∠1＝75°，則∠2＝？

(A)75°　
(B)60°　
(C)30°　
(D)15°

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