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S0G14 圓內接多邊形估計圓周率（基礎版）
Author:
学用数学
GeoGebra
New Resources
Earth with coastline
兩組對邊相等的四邊形
第八周作业
畫出對稱圖形
直角坐標平面上的旋轉變換
Discover Resources
Dilation of area
階梯圖形(一)
畢氏定理
固定周界長方形的面積變化（二）
卡瓦列里原理
Discover Topics
Line Segment
Correlation
Statistics
General Quadrilateral
Linear Equations