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gjc090a23 園內三角形與角度
Author:
謝定原
GeoGebra
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折扣
平行線的判定
撒针估算面积实验
中华人民共和国国旗
球体的截面
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Sum of Exterior Angles of Polygons 多邊形外角和
Locus: Fixed Distance From Straight Line
Sunline
拋物線與圓的最短距離
正N边形在圆内的滚动
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Rectangle
Integral Calculus
Random Variables
Equations
Root