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平行線 (同位角 - 4對)
Author:
Mr CHANG
GeoGebra
New Resources
球体的体积推导（优化版）
平行線的斜率
兩位數除以一位數（二）
漂亮的摇摆曲线
斜率的值
Discover Resources
Surface area of sphere
畢氏定理變裝證明
代數運算
拼貼3
我的第一个绘本
Discover Topics
Vectors 2D (Two-Dimensional)
Trigonometric Functions
Scalene Triangles
Frequency Distribution
Median Line