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判斷三角形
Author:
羅驥韡 (Pegasus Roe)
GeoGebra
New Resources
画直线等分三角形的面积
四邊形的特性
畫出對稱圖形
三位數除以一位數（二）
兩組對邊相等和有直角的四邊形
Discover Resources
Equal chords and their distances from the centre
triangle
同旁內角
到两点距离之积为定值的点的轨迹
五星红旗
Discover Topics
Real Numbers
Parabola
Ratios
Special Points
Secant Line or Secant