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Perigal's Dissection
Author:
Alex CHIK
GeoGebra
GeoGebra 互動數學教室
http://www.geogebra.hk
New Resources
漂亮的摇摆曲线
画直线等分三角形的面积
空间中两直线的位置关系
圓周公式的應用
【案例】2013年安徽高考15题
Discover Resources
eye tracing
教學－與直線有關的角
zuiduan
Angle between 2 planes
Illusion-外凸的正方形
Discover Topics
Tangent Function
Right Triangles
Linear Regression
Conditional Probability
Similar Triangles