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水波干涉
Author:
dunst kang
GeoGebra
New Resources
算柱 (兩位數)
直角坐標平面上的旋轉變換
球體建築師
sanjiaohanshu
三位數除以一位數（一）
Discover Resources
过圆上一点作切线，三步
分數除法
旋轉+伸縮正多邊形
Quiz on Solving Quadratic Inequalities 解二次不等式：測驗 (v2018)
圆周展开
Discover Topics
Rectangle
Pythagoras or Pythagorean Theorem
Parabola
Root
Hyperbola