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与椭圆焦点三角形外角平分线有关的轨迹.许兴华数学
Author:
许兴华数学
Topic:
Conic Sections
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龙形曲线-分形龙2
双心四边形
盈利與虧蝕
常见四边形是否是双心四边形
龙形曲线-分形龙
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clock
交錯弓形圓周角
平移動畫(平移加滑桿)
三角函數伸縮與平移
萬花筒
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Division
Ratios
Translation
Random Variables
Rotation