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外心
Author:
Bennie Liu
GeoGebra
New Resources
異分母分數減法
第八周作业
三位數除以一位數（一）
球體建築師
【案例】圆柱体内放置一个大球六个小球
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全等三角形
六年級_截面_柱體_多邊形
anlge at centre twice angle at circumference
Copy of 二次函數圖形
圆的有关概念
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Tangent Line or Tangent
Subtraction
Fractions
Rational Numbers
Matrices