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locus
Author:
chen mingchuan
GeoGebra
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兩組對邊相等的四邊形
【案例】2018年全国1卷理科12题
四邊形的特性
兩位數加法
兩組對邊相等和有直角的四邊形
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圓&五邊形
Archimedean spiral
周界
Copy of 固定周界的長方形的面積變化
reflection of tetrahedron
Discover Topics
Secant Line or Secant
Isosceles Triangles
Constructions
Quadratic Equations
Right Triangles