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Author:
李春培
GeoGebra
New Resources
祖冲之的期望：内棋与外棋
【案例】2013年安徽高考15题
垂直線的斜率
【案例】圆柱体内放置一个大球六个小球
三位數除以一位數（一）
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Demo
雙曲線
反射(鉛垂線、水平線及斜線) Reflection (vertical line, horizontal line and line)
根據百分率找數量（一）: 例3的副本
测试
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Pie Chart or Circle Chart
Arithmetic Operations
Vectors
Quadrilaterals
Expected Value