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三角函数：单位圆与函数图象
Author:
acchu
GeoGebra
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錐體建築師
判斷球體
兩位數除以一位數（二）
【案例】圆柱体内放置一个大球六个小球
柱體建築師
Discover Resources
線段上分點軌跡(橢圓)
八芒星
圓周率的應用 題C
弓形的滚动
畫三角形 題1b 的複本
Discover Topics
Random Experiments
Parallelogram
Difference and Slope
Symmetry
Circumcircle or Circumscribed Circle