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Hoehn's Theorem
Author:
Chenwei Chen
GeoGebra
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拼砌四邊形
兩組對邊相等的四邊形
畫出對稱圖形
判斷球體
兩位數除以一位數（一）
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正n凸多邊形旋轉對稱／反射對稱
平面幾何的思考
勝者即正義
同心六邊形
旋轉正方形
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Median Line
Function Graph
Statistical Characteristics
Pythagoras or Pythagorean Theorem
Trapezium