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用面積逼近圓周率
Author:
羅驥韡 (Pegasus Roe)
聖經裡面曾經將「圓周率」定為 3。 問題：聖經將「圓」當做「圓內正幾邊形」？
GeoGebra
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常见四边形是否是双心四边形
龙形曲线-分形龙2
探究三角形的全等條件
折扣
平行線的斜率
Discover Resources
根據百分率找數量（二）: 例4
line equation
橢圓軌跡02
圓周的計算
xsin(x)
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Right Triangles
LCM and GCD
Geometric Transformations
Differential Calculus
Pythagoras or Pythagorean Theorem