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Author:
1041015楊山佩
GeoGebra
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兩組對邊相等的四邊形
兩位數除以一位數（一）
四邉形 (四年級) 教師版
兩組對邊相等和有直角的四邊形
【案例】2013年安徽高考15题
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Concept of Ratios 比的概念
四邊形四個西姆松圓交於九點心
直角坐标
三角形的邊長
特殊四边形的转换
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Binomial Distribution
Upper and Lower Sum or Riemann Sum
Parabola
Circumcircle or Circumscribed Circle
Cube