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Helicoid
Author:
Jui-Tang Chen
Helicoid
GeoGebra
New Resources
近似值：有效數字
兩組對邊相等和有直角的四邊形
判斷球體
畫出對稱圖形
球體建築師
Discover Resources
下和與上和
百分數：折扣、盈利與虧損
定周长的正多边形面积变化规律
正四面體變菱形12面體
直线过定点问题(1)
Discover Topics
Secant Line or Secant
Function Graph
Rotation
Cosine
Addition