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Perigal's Dissection
Author:
Alex CHIK
GeoGebra
GeoGebra 互動數學教室
http://www.geogebra.hk
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【案例】2018年全国1卷理科12题
四邉形 (四年級) 教師版
畫出對稱圖形
三位數除以一位數（二）
找出對稱軸
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Erdos-Mordell 不等式
GGB動畫
同頂角_1
射线上滚动椭圆
PROBLEM SOLVING(COLOUR)
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Step Functions
Curve Sketching
Cube
Boxplot
Arithmetic