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優良作品8(宜庭)
Author:
Ching-Hui Chou
GeoGebra
New Resources
近似值：有效數字
兩位數加法
柱體建築師
四邊形的特性
三位數除以一位數（二）
Discover Resources
正方形與菱形
isosceles triangle construction
circle
三角函數的繪圖1
congruent triangles_provided by Mr Yeung Kar Chun
Discover Topics
Calculus
Circumcircle or Circumscribed Circle
Quadratic Equations
Division
Sine