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trapezium
Author:
iedc
GeoGebra
New Resources
科赫雪花
双心四边形
第八周作业2
常见四边形是否是双心四边形
三角函数 的副本
Discover Resources
拋物線?
函数的单调性和导数
包絡橢圓
紙張的長與闊
二次函数图像描点法
Discover Topics
Rotation
Pythagoras or Pythagorean Theorem
Hypothesis Testing
Rectangle
Arithmetic Operations