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Author:
philiplui
GeoGebra
New Resources
判斷球體
拼砌四邊形
球体的体积推导（优化版）
兩位數除以一位數（一）
兩組對邊相等和有直角的四邊形
Discover Resources
展開基本
Values of nCr & nPr 排列與組合的值
Dilate 習作
周界
半圓五角形滑動
Discover Topics
Symmetry
Percentages
Median Value
Differential Calculus
Similarity Transformation or Similarity