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正方形
Author:
chen mingchuan
Topic:
Square
GeoGebra
New Resources
兩組對邊相等和有直角的四邊形
四邊形的特性
球体的体积推导（优化版）
第八周作业
拼砌四邊形
Discover Resources
rotational symmetry_3
三角形外心的位置
正十二面體內接正六面體旋轉
拼出三角形的副本
曲面指令练习（柱球转化）
Discover Topics
Random Experiments
Reflection
Upper and Lower Sum or Riemann Sum
Limits
Logarithm