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GeoGebra
GeoGebra Classroom
GeoGebra
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20200818-2
Author:
173561212
GeoGebra
New Resources
盈利與虧蝕
正方形雪花图案
折扣
平行線的判定
斐波那契螺旋弧线（表格法）
Discover Resources
n等分點
「分點」平行四邊形
展開基本
等差數列的和
congruent (SSS) 2
Discover Topics
Sequences and Series
Limits
Reflection
Linear Equations
Vectors 3D (Three-Dimensional)