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Polygon Activity
Author:
Charlie Yip
Have fun
GeoGebra
New Resources
兩組對邊相等和有直角的四邊形
画直线等分三角形的面积
四邉形 (四年級) 教師版
兩位數除以一位數（二）
找出對稱軸
Discover Resources
阿基米德(3,8,8)
畢氏定理
分數加減
test2
橢圓的切線作圖
Discover Topics
Statistical Characteristics
Line Segment
Complex Numbers
Curve Sketching
Kite