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任務1
Author:
gklwong
Topic:
Triangles
GeoGebra
New Resources
畫出對稱圖形
拼砌四邊形
小数 的副本
sanjiaohanshu
四邊形的特性
Discover Resources
三角函數的性質
四下_面積（一）(學生版)
五形面體 序
勾股定理介绍及证明
DANDELIN
Discover Topics
Incircle or Inscribed Circle
Congruence
Symmetry
Piecewise Functions
Functions