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perpendicular line 25-9-2018
Author:
LEE KA YIU
GeoGebra
New Resources
球体的截面
龙形曲线-分形龙2
常见四边形是否是双心四边形
双心四边形
折扣
Discover Resources
中點軌跡(動點在兩圓上)
摩天輪
比較角的大小
重心三等分三角形
直线与圆的位置关系
Discover Topics
Cuboid
Conic Sections
Trigonometry
Differential Calculus
Special Points