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優良作品1(孟倫)
Author:
Ching-Hui Chou
GeoGebra
New Resources
兩位數加法
兩組對邊相等和有直角的四邊形
四邊形的特性
兩位數除以一位數（二）
球体的体积推导
Discover Resources
regular hexagon construction
Rotation
GGB DAY3
homework
变化的幂函数.许兴华数学
Discover Topics
Similar Triangles
Sequences and Series
Division
Addition
Tree Diagrams