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抛物线的弦过定点的动画
Author:
许兴华数学
Topic:
Conic Sections
GeoGebra
New Resources
算柱 (兩位數)
兩組對邊相等的四邊形
拼砌四邊形
兩組對邊相等和有直角的四邊形
画直线等分三角形的面积
Discover Resources
(正)長方體
畢氏定理證明
三角函數值 (特別角)
高考椭圆题的动态演示1.许兴华数学
龙形曲线-分形龙2
Discover Topics
Tangent Line or Tangent
Cone
Numbers
Polygons
General Quadrilateral