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同旁內角---不平行綫
Author:
chanfushun
GeoGebra
New Resources
兩組對邊相等和有直角的四邊形
【案例】2013年安徽高考15题
直角坐標平面上的旋轉變換
兩位數除以一位數(二)
錐體建築師
Discover Resources
心臟線方程式
椭圆的参数方程
圆锥曲线定义的拓展(卡西尼卵形线)
glt-h02-00-正方形折成三角錐
有趣的梯形面積問題
Discover Topics
Arithmetic Operations
Similar Triangles
Real Numbers
Pythagoras or Pythagorean Theorem
Vectors 2D (Two-Dimensional)