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正七邊形

Author:: 李春培

正七邊形

GeoGebra Applet

正七邊形

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圖解兩向量所張開之平行四邊形面積
平行线错觉
練習_對稱
Template: Symmetry04
展開圓面積 (講義版)的副本

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兩正弦波的合成波
全等三角形
公切線(配合Dilate指令)
相同圖形的拼砌（梯形）
讀磅 (練習)

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