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學習單：三角形任一外角與內角關係
Author:
Tsai, Dung Jung
,
Tim Brzezinski
GeoGebra
New Resources
兩位數加法
三位數除以一位數（一）
兩位數除以一位數（一）
拼砌四邊形
異分母分數減法
Discover Resources
task6
Tangent properties
繡曲線01
[洋葱] 与相似有关的定值问题-Q2
分页显示及分步显示
Discover Topics
Numbers
Diagrams
Rectangle
Cuboid
Incircle or Inscribed Circle