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银币
Author:
luodeqin@keleshuxue.com
GeoGebra
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多邊形的面積
漂亮的摇摆曲线
双心四边形
【案例】2013年安徽高考15题
祖冲之的期望：内棋与外棋
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類尺規作圖
Locus: Fixed Distance From Line Segment
切割正四面體
調和平均數、算術平均數、幾何平均數、平方平均數之間的不等式
旋转的花瓣
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Integral Calculus
Continuity
Polygons
Differential Equation
Conditional Probability