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圓心在同一直線上且相切的圓(半徑可改變)
Author:
lee chao ming
GeoGebra
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【案例】2018年全国1卷理科12题
兩位數除以一位數(二)
【案例】2013年安徽高考15题
祖冲之的期望:内棋与外棋
直線的斜率
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圓繞圓
平移2
Perimeter
三宅一生132 5
橢圓的切線作圖
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Tangent Function
Means
Combinatorics
Quadrilaterals
Derivative