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World's Hardest Easy Geometry Problem.
Author:
Terry Chau
Topic:
Geometry
幾何老題１
GeoGebra
New Resources
Fibonacci Clock
幾何作圖題：切三圓（題目）
算柱 (兩位數)
世界平面地圖 (Codex╱2026.10.07)
美國國旗 (Codex 版)
Discover Resources
河內塔 1
龍騰4_1-1講段8
小精靈
∆ABD 面積 = ?
波的叠加
Discover Topics
Straight Lines
Area
Numbers
Median Line
Geometric Transformations