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MEd-量度地球的圓周
Author:
W.L. Wong, Albert
GeoGebra
New Resources
柱體建築師
四邊形的特性
錐體建築師
兩位數除以一位數（一）
畫出對稱圖形
Discover Resources
行程圖 (Travel Graph)
測試
Copy of 固定面積的圖形的周界變化
定周长的正多边形面积变化规律（含圆）
定理介紹：切線與半徑 | Tangent and Radius
Discover Topics
Pyramid
Orthocenter
Cylinder
Constructions
Definite Integral