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2014希望盃九年級初試第九題
Author:
連琨銘
GeoGebra
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四邊形的特性
三位數除以一位數（二）
拼砌四邊形
兩位數除以一位數（二）
球体的体积推导
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橢圓規
Introduction to Trigonometry from a Unit Circle
餘弦定理修正項及風車證明
半椭圆面积的定积分动态演示.许兴华数学
美图欣赏-线绳艺术
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Incircle or Inscribed Circle
Vectors 2D (Two-Dimensional)
Difference and Slope
Rectangle
Limits