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餘弦定理
Author:
yuchengda
GeoGebra
New Resources
【案例】2018年全国1卷理科12题
画直线等分三角形的面积
找出對稱軸
GeoGebra笔记功能体验课件
兩位數除以一位數（二）
Discover Resources
繞行
ghseh 二次函數描點法左右平移-2
圓內接四邊形任務二
Cuboid 長方體
多邊形面積(新一代第三版 EX22#8)
Discover Topics
Congruence
Linear Regression
Interest Calculation
Symmetry
Upper and Lower Sum or Riemann Sum