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15.下列何者形狀大小皆相同的地磚,不可以緊密地舖設在地面上?(A)正三角形 (B)正方形 (C)正五邊形(D)正六邊形 。
問題詳情
15.下列何者形狀大小皆相同的地磚,不可以緊密地舖設在地面上?
(A)正三角形
(B)正方形
(C)正五邊形
(D)正六邊形 。
參考答案
答案:C
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要「貼密」,則一個內角角度乘上某個正整數要等於360度。(A)正三角形,每角60度,60*6=360(可以)
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14.下列哪一種作圖無法使用尺規完成?(A) 將 一 線 段 分 成 5 : 11 的 兩線段(B)已知長度為 1 的線段,畫出長度為 的線段(C) 已知三角形的二股長 , 畫 出 一 個 直角三角
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