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Tangents from an External Point
Author:
Y.C.Lee
,
aamtinc
GeoGebra
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【案例】2018年全国1卷理科12题
兩組對邊相等和有直角的四邊形
兩位數除以一位數（一）
【案例】2013年安徽高考15题
第八周作业
Discover Resources
弦的定理
Sequence指令練習(逐一套疊三角形)
过圆上一点作切线，三步
Multiplication of Directed Numbers
存款模擬程式
Discover Topics
Derivative
Exponential Functions
Polygons
Sequences and Series
Differential Calculus