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World's Second-Hardest Easy Geometry Problem
Author:
Terry Chau
Topic:
Geometry
幾何老題2
GeoGebra
New Resources
画直线等分三角形的面积
找出對稱軸
異分母分數減法
三位數除以一位數（二）
四邉形 (四年級) 教師版
Discover Resources
圆锥曲线包络
操場
五圓相切
HW question locus 2
拋物線6-包絡線法
Discover Topics
Tangent Function
Orthocenter
Congruence
Calculus
Power Functions