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五圓相切
Author:
susan
兩兩相切
GeoGebra
New Resources
算柱 (兩位數)
三位數除以一位數（一）
錐體建築師
判斷球體
找出對稱軸
Discover Resources
數學題目的模型
正三角形尺规作图
task6
test book
我的第一个GGB绘本
Discover Topics
Pythagoras or Pythagorean Theorem
Multiplication
Geometric Transformations
LCM and GCD
Trapezoid