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作垂线或平行线
Author:
龚佳林
过已知点作已知直线的垂线
GeoGebra
过已知点作已知直线的平行线
GeoGebra
New Resources
兩位數除以一位數（一）
画直线等分三角形的面积
球體建築師
柱體建築師
算柱 (兩位數)
Discover Resources
beauty from WuLing.TW
Geometry: Angles Sum of Triangle (幾何：三角形內角和)
Test
滑桿2
一筆畫圖形
Discover Topics
Volume
Tangent Function
Sphere
Inequalities
Secant Line or Secant