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最小周長
Author:
張庭瑞
GeoGebra
New Resources
画直线等分三角形的面积
兩位數除以一位數（二）
圓的切線方程
【案例】2013年安徽高考15题
讀磅
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領結的角度
Book4
費氏螺旋線(配合試算表)
B4 4-1 平行線性質延伸 等積變換
和两个圆都相切的圆
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Combinatorics
Sequences and Series
Derivative
Exponential Functions
Linear Programming or Linear Optimization