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Author:
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GeoGebra
New Resources
拼砌四邊形
找出對稱軸
兩組對邊相等的四邊形
算柱 (兩位數)
近似值：有效數字
Discover Resources
五星形的頂角
小精靈
Measuring Volume 2
圓滾動
兩圓動點中點軌跡
Discover Topics
Cosine
Ellipse
Solids or 3D Shapes
Arithmetic Mean
Pythagoras or Pythagorean Theorem