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三節棍1060317
Author:
陳正鴻
GeoGebra
New Resources
兩組對邊相等的四邊形
sanjiaohanshu
第八周作业
近似值：有效數字
兩位數除以一位數（二）
Discover Resources
pictures
sun2
翹翹板
對稱成分(零序.正序.負序)
固定三角形的條件−題1的副本
Discover Topics
Isosceles Triangles
Trigonometry
Vectors 3D (Three-Dimensional)
Sphere
Upper and Lower Sum or Riemann Sum