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Author:
Yan Dongtai（严东泰）
GeoGebra
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异形操场
科赫雪花
直線的斜率：水平變化 & 鉛垂變化
第八周作业1
龙形曲线-分形龙
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分數的加法
正方體及正四面體的對稱性質
Apollonius Problem gergonne 0
貸款
動態幾何錯覺
Discover Topics
Tangent Function
Dilation
Special Points
Straight Lines
Cuboid