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練習 - 逆時針旋轉（三角形）
Author:
Lau Sir
Topic:
Triangles
GeoGebra
New Resources
画直线等分三角形的面积
兩位數加法
錐體建築師
【案例】2018年全国1卷理科12题
兩位數除以一位數（一）
Discover Resources
二項分布與抽樣 (iPad 適用)
減法
向量分點公式
Area of rectangle_Question F
正弦函数自变量的几何显示
Discover Topics
Linear Equations
Upper and Lower Sum or Riemann Sum
Mode
Random Experiments
Fractions