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相对坐标系2
Author:
同 吴
GeoGebra
New Resources
球體建築師
三位數除以一位數（二）
拼砌四邊形
画直线等分三角形的面积
找出對稱軸
Discover Resources
Symmetric 設計對稱圖案(一條對稱軸)(垂直)
角平分線分點比例
認識分數
拋物線5--包絡線法
橢圓規Ellipsograph (Trammel of Archimedes)
Discover Topics
Complex Numbers
Functions
Step Functions
Frequency Distribution
Addition