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赵爽弦图
Author:
林峰
GeoGebra
New Resources
活动三：应用性质
撒针估算面积实验
斐波那契螺旋弧线（表格法-可动态调节）
折扣
平行線的判定
Discover Resources
等腰，角度关系
Circle Properties
軌跡
Slope 斜率 - 概念及定義 (3)的副本
模拟龟兔画板
Discover Topics
Orthocenter
Right Triangles
Perimeter
Trigonometric Functions
Statistics