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一线三等角模型
Author:
辛贺华
GeoGebra
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兩位數除以一位數（一）
兩組對邊相等的四邊形
找出對稱軸
兩組對邊相等和有直角的四邊形
球体的体积推导
Discover Resources
有趣的切圓
Trajectory of system: y'=y^2-y
test
Question 2(Angle)
Binary Clock 二进制时钟
Discover Topics
Ellipse
Statistical Characteristics
Geometric Distribution
Prism
Complex Numbers