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角的大小與角兩臂的長度有關？
Author:
cwc
GeoGebra
New Resources
兩組對邊相等和有直角的四邊形
找出對稱軸
判斷球體
GeoGebra笔记功能体验课件
三位數除以一位數（一）
Discover Resources
第一冊
How to draw a square with ruler and compasses?
三角函數名稱的由來
正棱台的侧面展开效果
物體的平面運動
Discover Topics
Cosine
Symmetry
Diagrams
Functions
Tangent Line or Tangent