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Author:
Lin Ching Chieh
GeoGebra
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兩位數加法
画直线等分三角形的面积
兩組對邊相等的四邊形
球體建築師
【案例】2013年安徽高考15题
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好玩的輪盤
擲兩個硬幣的機率分布
選擇合適的「中間人」
angles sum of a triangle 2
圆锥侧面展开
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Arithmetic
Rhombus
General Quadrilateral
Coordinates
Diagrams