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S408 Penrose 階梯
Author:
学用数学
GeoGebra
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四邉形 (四年級) 教師版
找出對稱軸
判斷球體
兩組對邊相等的四邊形
兩位數除以一位數（一）
Discover Resources
分數減法
會動的旋轉圖案+軌跡
中點軌跡(動點在兩圓上)
較複雜的周界問題(一)
Gazing Cow Problem (c)
Discover Topics
Pyramid
Inequalities
Numbers
Planes
Terms