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拋物線之極偶 / polarity for parabola
Author:
XIE Yuheng
GeoGebra
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垂直線的斜率
【案例】2018年全国1卷理科12题
【案例】2013年安徽高考15题
兩位數加法
多邊形的面積
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繞行
證平行四邊形 (對邊相等)
三棱柱
正投影
S3 Ch4.3 例4.6b 三視圖(3D圖)
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Constructions
Root
Vectors
Percentages
Indefinite Integral