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Author:
keith leung
,
Tim Brzezinski
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GeoGebra
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算柱 (兩位數)
兩組對邊相等的四邊形
小数 的副本
兩位數除以一位數（一）
四邉形 (四年級) 教師版
Discover Resources
Contour Lines 等高線
認識公里
day01_01
任意三角形
角度、弧度互換
Discover Topics
Expected Value
Statistical Characteristics
Conditional Probability
Orthocenter
Equilateral Triangles