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trigo ratios np2c
Author:
np2cmath
GeoGebra
New Resources
兩位數除以一位數（一）
兩位數加法
四邊形的特性
畫出對稱圖形
兩位數除以一位數（二）
Discover Resources
正方變十字
對稱和變換
利用按扭制作控制動畫的開關
國旗製作
Pyramid with square base (angle between planes)
Discover Topics
Surface
Sequences and Series
Special Points
Derivative
Combinatorics