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Author:
马云辉
GeoGebra
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四邉形 (四年級) 教師版
錐體建築師
兩組對邊相等的四邊形
三位數除以一位數（一）
找出對稱軸
Discover Resources
GriffithsTheorem
zuiduan
學習活動三聯立不等式的圖形
frustum by Mr LO WY
比較角的大小(直接比較)
Discover Topics
Parametric Curves
Integral Calculus
Optimization Problems
Sequences and Series
Perimeter