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齐次坐标（云教材）
Author:
代国兴
GeoGebra
New Resources
讀磅
撒针估算面积实验
双心四边形
龙形曲线-分形龙2
圓的基本性質
Discover Resources
精神堡壘
一元二次方程式
分段函數作圖教學
MFS Pyth Thm 2
題4
Discover Topics
Curve Sketching
Pythagoras or Pythagorean Theorem
Linear Regression
Step Functions
Cone