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angle between lines
Author:
johnmayhk
GeoGebra
New Resources
漂亮的摇摆曲线
圓周公式的應用
空间中两直线的位置关系
画直线等分三角形的面积
平行線的斜率
Discover Resources
y=a(x-h)²+k
畢氏定理
選擇合適的「中間人」
同旁內角---垂直平行綫
堆疊正立方體的副本
Discover Topics
Optimization Problems
Line Segment
General Quadrilateral
Equations
Geometric Transformations