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三角形内角和的折叠法演示
Author:
孟宝兴
制作：梁爱社，修订：孟宝兴
GeoGebra
New Resources
龙形曲线-分形龙
第八周作业3
撒针估算面积实验
科氏力 (Coriolis Force)
双心四边形
Discover Resources
二次函數
立体几何
Similar Triangles
六角形(草稿)
HOMEWORK
Discover Topics
Pythagoras or Pythagorean Theorem
Arithmetic Operations
Curve Sketching
Variance
Congruence