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Author:
陈先生
GeoGebra
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畫出對稱圖形
兩組對邊相等的四邊形
三位數除以一位數（一）
判斷球體
找出對稱軸
Discover Resources
根據百分率找數量（二）: 例4
鋸齒狀的函數
分數乘法的副本
基础知识
求公切線段長
Discover Topics
Cosine
Indefinite Integral
Pythagoras or Pythagorean Theorem
Centroid or Barycenter
Statistics