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一线三等角模型
Author:
辛贺华
GeoGebra
New Resources
錐體建築師
兩組對邊相等和有直角的四邊形
拼砌四邊形
四邊形的特性
兩位數除以一位數（一）
Discover Resources
數學模型
Percentage (Part-Whole) 所佔百分數
標準差：測驗
雜類(Miscellaneous)
正六面体分形
test for fun的副本
Discover Topics
Means
Straight Lines
Perimeter
Secant Line or Secant
Logarithm