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三角形的高
Author:
王巍
GeoGebra
New Resources
第三周作业效果演示
龙形曲线-分形龙
正方形雪花图案
双心四边形
科赫雪花
Discover Resources
特別角的三角函數值(1)
smps perimeter
Ambiguous Cylinder illusion
彩色包絡球
folding paper by Mr LO WY
Discover Topics
Symmetry
Function Graph
Constructions
Pyramid
Circumcircle or Circumscribed Circle