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摺正三角形
Author:
h6741957g
GeoGebra
New Resources
錐體建築師
球體建築師
找出對稱軸
兩位數加法
三位數除以一位數（二）
Discover Resources
圓周角與弦切角
梯形有甚麼特性？
CIRCLE
梯形堆垛
描点法画三角函数图像
Discover Topics
Planes
Median Line
Cosine
Cone
Probability