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Author:
johnmayhk
GeoGebra
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常见四边形是否是双心四边形
撒针估算面积实验
活动三：应用性质
百分數及其應用
第八周作业
Discover Resources
直式算式(可包含單位)
規律幾何圖形珠串
等截距和直線包絡拋物線
斜坐標
求公切線段長
Discover Topics
Dilation
Polygons
Plane Figures or Shapes
Numbers
Conditional Probability