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三角形的外心
Author:
侯杰材
GeoGebra
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垂直線的斜率
常见四边形是否是双心四边形
漂亮的摇摆曲线
圓周公式的應用
祖冲之的期望：内棋与外棋
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公因數應用題2
角平分線製作
Ch 12 Angles related to straight lines
Copy of 劉徽的「割圓術」
拋物線4-平行四邊形法
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Probability
Difference and Slope
Cube
Correlation
Means