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神之作
Author:
彭柏淵
GeoGebra
New Resources
拼砌四邊形
錐體建築師
兩組對邊相等和有直角的四邊形
兩位數加法
兩位數除以一位數（二）
Discover Resources
橢圓
trapezoid2
七巧板
四邊形ADFE的面積是多少？
QQ空间
Discover Topics
Similar Triangles
Linear Equations
Frequency Distribution
Arithmetic Operations
Addition