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转盘
Author:
许业成
GeoGebra
New Resources
兩組對邊相等和有直角的四邊形
兩位數加法
兩組對邊相等的四邊形
球体的体积推导（优化版）
兩位數除以一位數（一）
Discover Resources
極線獨立定理 / polar independence theorem
和的完全平方
點到直線距離-3 最短發生在垂直時
Activity 3
分數比較
Discover Topics
Trigonometry
Hypergeometric Distribution
Translation
Trigonometric Functions
Dilation