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1. ( )右圖為兩直圓錐疊合而成的立體圖形,則其表面積為多少平方單位? (A) 100π(B) 110π(C)120π(D)130π
問題詳情
1. ( )右圖為兩直圓錐疊合而成的立體圖形,則其表面積為多少平方單位?
(A) 100π
(B) 110π
(C)120π
(D)130π
參考答案
答案:C
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設側面扇形的圓心角為 x°扇形的半徑=12...
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