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Author:
李春培
GeoGebra
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兩位數除以一位數（二）
球體建築師
兩組對邊相等和有直角的四邊形
四邉形 (四年級) 教師版
【案例】2018年全国1卷理科12题
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Quiz on Projection of a Line Segment on a Plane 投影：測驗
HKMO 2013 Question 3 Demonstration (Geometric Construction)
Copy of 包含除法（整數或分數 ÷ 分數）
謝爾冰司機-正方形
拋物線5--包絡線法
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Percentages
Expected Value
Sphere
Matrices
Cone