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34. 如圖(十六),有兩全等的正三角形 ABC、DEF,且D、A 分別為 △ABC、△DEF 的重心。固定D 點,將 △DEF 逆時針旋轉,使得A 落在 上,如圖(十七)所示。求圖(十六)與圖(十七
問題詳情
34. 如圖(十六),有兩全等的正三角形 ABC、DEF,且D、A 分別為 △ABC、△DEF 的重心。固定D 點,將 △DEF 逆時針旋轉,使得A 落在
上,如圖(十七)所示。求圖(十六)與圖(十七)中,兩個三角形重疊區域的面積比為何?
(A) 2 : 1
(B) 3 : 2
(C) 4 : 3
(D) 5 : 4
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