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ptcc trigo level 2
Author:
Cheung Wing Chuen
GeoGebra
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兩位數除以一位數（二）
找出對稱軸
異分母分數減法
【案例】2018年全国1卷理科12题
四邊形的特性
Discover Resources
正弦函数图像
Ambiguous Cylinder illusion
試作
四邊形外接正方形
函數的面積 (黎曼和)的副本
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Centroid or Barycenter
Binomial Distribution
Rational Numbers
Plane Figures or Shapes
Solids or 3D Shapes