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正方形
Author:
何嘉驹
GeoGebra
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直線的斜率：水平變化 & 鉛垂變化
正方形雪花图案
双心四边形
第八周作业3
撒针估算面积实验
Discover Resources
正方體的反射對稱3
Apollonius Problem 7 CCP Inversion simple 12
反射變換
doto属性研究
序列
Discover Topics
Integers
Upper and Lower Sum or Riemann Sum
Arithmetic
Sine
Triangles