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三角形三边关系
Author:
acchu
GeoGebra
New Resources
兩組對邊相等的四邊形
美國國旗 (Codex 版)
Nested spiral octagon
Fibonacci Clock
找出對稱軸
Discover Resources
v中點座標軌跡(圓大正多邊形小)
gjc096a19 平行四邊形內截兩扇形
正方体
Template: 圓周
圆的平移（平移加滑桿）
Discover Topics
Parametric Curves
Geometric Transformations
Distributions
Orthocenter
Ellipse