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乘法1
Author:
chen mingchuan
GeoGebra
New Resources
平行線的判定
斐波那契螺旋弧线(表格法)
常见四边形是否是双心四边形
球体的截面
龙形曲线-分形龙
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三角函數
線性組合1:正六邊形
外心垂心問題
Copy of 正方体展开图
四下_面積(一)(教師版)
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Equations
Tangent Function
Coordinates
Addition
Vectors 2D (Two-Dimensional)