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将军饮马——三角形周长最小
Author:
陈宜红
Topic:
Symmetry
,
Triangles
GeoGebra
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第八周作业1
第八周作业3
撒针估算面积实验
正方形雪花图案
平行線的判定
Discover Resources
線性變換對圖形的影響
Ambiguous Cylinder Illusion
Locus (Non parallel lines)
椭圆的两条垂直切线的交点轨迹 蒙日圆
一次函数的引入
Discover Topics
Cone
Constructions
Algebra
Incircle or Inscribed Circle
Subtraction