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反射圆,反射线
Author:
getfile
GeoGebra
New Resources
科赫雪花
斐波那契螺旋弧线（表格法-可动态调节）
圓的基本性質
折扣
直線的斜率：水平變化 & 鉛垂變化
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Measuring Volume 2
线段
Template: 對稱03
Copy of Quiz on Solving Quadratic Inequalities 解二次不等式：測驗
等比数列前n项和公式
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Optimization Problems
Geometry
Similar Triangles
Linear Equations
Histogram