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内凹正方形
Author:
许业成
GeoGebra
New Resources
找出對稱軸
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）
第八周作业
Discover Resources
橫斷式研究之樣本數估計（Outcome為odds ratio）
Quiz on Factorization of Quadratic Polynomials (Cross Method) 因式分解一元二次多項式(十字相乘法)：測驗
累積頻數多邊形
分數乘法的副本
Ex5C#2
Discover Topics
Sphere
Mathematics
Vectors 3D (Three-Dimensional)
Geometry
Parametric Curves