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30度直角三角形
Author:
郭勇
GeoGebra
New Resources
兩位數加法
柱體建築師
四邉形 (四年級) 教師版
判斷球體
三位數除以一位數（一）
Discover Resources
固定周界的長方形的面積變化
畢氏定理拼圖
百葉窗
不規則多邊形塗色
拋物線1-焦點法
Discover Topics
Vectors 2D (Two-Dimensional)
Cube
Parabola
Difference and Slope
Cylinder