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平移旋轉對稱
Author:
chen mingchuan
GeoGebra
New Resources
sanjiaohanshu
三位數除以一位數（二）
四邊形的特性
拼砌四邊形
兩組對邊相等和有直角的四邊形
Discover Resources
Conductivity
椭圆的定义
正三角疊代
拋物線2--焦點法
拼數咭
Discover Topics
Geometric Distribution
General Quadrilateral
Root
Pythagoras or Pythagorean Theorem
Cuboid