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Heidi Lin - Conic Section
Author:
heidi1104
GeoGebra
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画直线等分三角形的面积
拼砌四邊形
三位數除以一位數（一）
異分母分數減法
畫出對稱圖形
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檢驗區
F.3 Ch.10 Application of Trigonometry
test
动点在折线或多边形上做匀速运动的实现方法-单位向量法
推移（x 方向）的副本
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Right Triangles
Arithmetic Mean
Rectangle
Cuboid
Cube