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正方形
Author:
chen mingchuan
Topic:
Square
GeoGebra
New Resources
兩組對邊相等和有直角的四邊形
三位數除以一位數（二）
【案例】圆柱体内放置一个大球六个小球
拼砌四邊形
兩組對邊相等的四邊形
Discover Resources
S5 geometry
反射原理
陳人瑜proof81
Pentacle
勒洛三角形頂點A軌跡
Discover Topics
Orthocenter
Addition
Secant Line or Secant
Ratios
Histogram