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利用对称求线段和最值（移动端）
Author:
梁航宇
GeoGebra
New Resources
直角坐標平面上的旋轉變換
Fibonacci Clock
Earth with coastline
美國國旗 (Codex 版)
拼砌四邊形
Discover Resources
bkb-切割线定理
Area of triangle using 0.5bs sinA
分數乘法的副本
Similar triangles inscribed iteration
椭圆的两条垂直切线的交点轨迹 蒙日圆
Discover Topics
Function Graph
Real Numbers
Hypothesis Testing
Special Points
Percentages