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周界和面積
Author:
Tse Sir
GeoGebra
New Resources
國旗 (作圖步驟直接餵給 Claude)
近似值：有效數字
畫出對稱圖形
Earth with coastline
兩組對邊相等和有直角的四邊形
Discover Resources
分數乘法 (2012年9月27日更新)
[S2] a revised version of Jane’s GeoGebra file (modified by the author)
太陽系的認識(問答)
箭頭引導法計算文字乘以文數字
俄罗斯方块（第二版）
Discover Topics
Intersection
Area
Trigonometry
Natural Numbers
Cuboid