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画角平分线
Author:
杜灵增
GeoGebra
New Resources
兩組對邊相等的四邊形
找出對稱軸
近似值：有效數字
異分母分數減法
三位數除以一位數（二）
Discover Resources
兩個點波源產生的波紋
有趣的反例
拋物線(到一點與到一直線等距離的軌跡)
Twghmkc_時鐘
海螺
Discover Topics
Correlation
Intersection
Pie Chart or Circle Chart
Linear Programming or Linear Optimization
Equilateral Triangles