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內旋輪線圖西對 (Tusi couple)
Author:
王一哲
Topic:
Constructions
GeoGebra
New Resources
兩組對邊相等和有直角的四邊形
判斷球體
画直线等分三角形的面积
兩位數除以一位數（一）
找出對稱軸
Discover Resources
立體錯覺樓梯(使用透視法會稍有差距)
旋轉的概念
橢圓折痕
梯形面積(求上底)
序列向量
Discover Topics
Pythagoras or Pythagorean Theorem
Ellipse
Trigonometric Functions
Boxplot
Difference and Slope