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面積和周界
Author:
Maggie kan
GeoGebra
New Resources
兩位數加法
兩組對邊相等和有直角的四邊形
錐體建築師
兩位數除以一位數（二）
四邉形 (四年級) 教師版
Discover Resources
最小值
面積切割
考卷圖片
平面区域的理解
Parabola_Vertical
Discover Topics
Quadratic Functions
Random Experiments
Difference and Slope
Matrices
Linear Programming or Linear Optimization