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Math
Author:
fung yiu cho
GeoGebra
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兩組對邊相等和有直角的四邊形
画直线等分三角形的面积
三位數除以一位數（二）
四邉形 (四年級) 教師版
拼砌四邊形
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test for 2nd view
B3_1-5_互動例6
旋轉+伸縮正多邊形
Net of cone
軌跡 直線 (與兩平行線等距)
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Equilateral Triangles
Linear Equations
Confidence Interval
Hyperbola
Area