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餘弦定理
Author:
yuchengda
GeoGebra
New Resources
圓的基本性質
撒针估算面积实验
折扣
直線的斜率：水平變化 & 鉛垂變化
正方形雪花图案
Discover Resources
冷氣機的銷量
線性組合
六年級_正方體截面
試算表2
matrix of rotation transformation
Discover Topics
Addition
Area
Tangent Line or Tangent
Vectors 2D (Two-Dimensional)
Functions