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conics
Author:
Ho-Kai Chen
GeoGebra
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兩組對邊相等和有直角的四邊形
拼砌四邊形
兩組對邊相等的四邊形
兩位數除以一位數（一）
【案例】2018年全国1卷理科12题
Discover Resources
極線對偶定理 / polar duality theorem
Conic section
密鋪4
Fill the circle的副本
單點透視法
Discover Topics
Logarithmic Functions
Polygons
Boxplot
Rhombus
Polynomial Functions