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S0G14 圓內接多邊形估計圓周率（基礎版）
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学用数学
GeoGebra
New Resources
GeoGebra笔记功能体验课件
兩位數除以一位數（二）
兩組對邊相等和有直角的四邊形
異分母分數減法
畫出對稱圖形
Discover Resources
waaachen
Quiz on Angles associated with Parallel Lines 平行線上的角：測驗
柱體建築師
優良作品2(怡雯)
纏繞畫2
Discover Topics
Confidence Interval
Cube
Differential Equation
Fractions
Pythagoras or Pythagorean Theorem