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正4正8黏合
Author:
Wu Xiao-Ren
GeoGebra
New Resources
拼砌四邊形
兩組對邊相等和有直角的四邊形
兩位數加法
三位數除以一位數（二）
錐體建築師
Discover Resources
三角形的构成
-1/8 ≤ cosα cosβ cosγ ≤ 1
解題二
学习几何
翰林數學_2下_CH3-1_多邊形的內角和
Discover Topics
Linear Regression
Cosine
Standard Deviation
Random Variables
Geometric Mean