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同心圓
Author:
許清惟
GeoGebra
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斜率的值
平行線的斜率
双心四边形
常见四边形是否是双心四边形
第八周作业3
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單相感應電動機原理
整數加減向量示意
轨迹2016.4.16
EARTH01
拋物線1-焦點法
Discover Topics
Linear Equations
Multiplication
Upper and Lower Sum or Riemann Sum
Scatter Plot
Boxplot