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Venn Diagram (2 Sets)
Author:
徐长俊
GeoGebra
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圓的切線方程
常见四边形是否是双心四边形
活动三：应用性质
龙形曲线-分形龙2
平行線的判定
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橢圓軌跡 (3)
整數÷整數_工作紙（一）_題5
gct-a01-jc095v2-27 三角形中線
兩弦的長度比較
anlge at centre twice angle at circumference
Discover Topics
Trapezoid
Cylinder
Incircle or Inscribed Circle
Quadrilaterals
Histogram