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椭圆内切圆链
Author:
孟宝兴
GeoGebra
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【案例】2018年全国1卷理科12题
四邊形的特性
拼砌四邊形
兩位數除以一位數（一）
画直线等分三角形的面积
Discover Resources
題 7
Binomial Formula
line equation
史坦納圓 (Steiner Circle)
轴对称
Discover Topics
Plane Figures or Shapes
Congruence
Intersection
Polygons
Quadratic Functions