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Author:
李政憲
GeoGebra
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拼砌四邊形
【案例】2013年安徽高考15题
三位數除以一位數（二）
四邉形 (四年級) 教師版
球體建築師
Discover Resources
三角形面積與內切圓半徑
Angle between Plane and Plane
正方形截痕
Locus
相机光圈模拟（3D）
Discover Topics
Complex Numbers
Fractions
Binomial Distribution
Linear Equations
Quadrilaterals