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因數（1至24）
Author:
Tong Wing Hong
GeoGebra
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平行線的斜率
漂亮的摇摆曲线
垂直線的斜率
圓周公式的應用
圓的基本性質
Discover Resources
equilateral triangle construction
三角函數
題10
sin的平移與伸縮
繪畫梯形
Discover Topics
Quadratic Equations
Quadrilaterals
Area
Matrices
Variance