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GeoGebra
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Draw a Flower
Author:
陳隆期
GeoGebra
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盈利與虧蝕
直線的斜率：水平變化 & 鉛垂變化
平行線的判定
第八周作业
撒针估算面积实验
Discover Resources
複息的威力
o'clcok
大小相同串珠
初中数学
內含正方形的正方形
Discover Topics
Congruence
Equilateral Triangles
Complex Numbers
Means
Square