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congruent (SSS) 2
Author:
Ricky Chan
GeoGebra
New Resources
画直线等分三角形的面积
兩組對邊相等的四邊形
【案例】2013年安徽高考15题
兩位數加法
判斷球體
Discover Resources
Standard Deviation (one data set) 標準差（一組數據）
拋物線與直線相交弓形區域
二次函数与一元二次方程和一元二次不等式
Copy of 固定周界的長方形的面積變化
circle: line from centre
Discover Topics
Difference and Slope
Logic
Intersection
Random Variables
Quadrilaterals