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Coffee Gold Cup
Author:
Chenwei Chen
GeoGebra
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直線的斜率
龙形曲线-分形龙2
折扣
百分數及其應用
常见四边形是否是双心四边形
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平行四邊形
GGB5---3D功能
圖形周界_H
國旗
鸚鵡螺旋線
Discover Topics
Cylinder
Rational Numbers
Statistical Characteristics
Trapezoid
General Quadrilateral