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数矩形个数
Author:
dhc987
GeoGebra
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Earth with coastline
AI 訓練教室
中華民國國旗 (Codex╱2026.10.06)
算柱 (兩位數)
幾何作圖題：切三圓（題目）
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waaachen
斯坦納-雷米歐司(Steiner-Lehmus)定理推廣
雙曲線20160521
正三角形
長方形的周界與長和闊的關係 (教師版)
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Angles
Kite
Plane Figures or Shapes
Matrices
Square