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鉛筆的長度
Author:
GeoGebra Institute of Hong Kong
Topic:
Geometry
GeoGebra
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斐波那契螺旋弧线（表格法-可动态调节）
折扣
三角函数 的副本
正方形雪花图案
第三周作业效果演示
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clock
可變大的圓桌
becca貝卡卡
圓錐截痕模型
中位线的副本
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Cone
Equations
Median Line
Line Segment
General Quadrilateral