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Polygonal numbers
Author:
Tung Chao
Topic:
Numbers
Use triangular and square numbers to investigate number patterns
GeoGebra
New Resources
算柱 (兩位數)
兩組對邊相等和有直角的四邊形
長方體平面投影 (Codex版)
小数 的副本
拼砌四邊形
Discover Resources
集合運算
斯坦納-雷米歐司(Steiner-Lehmus)定理證明一
製作對稱圖 LEVEL 3
SolvingEquation_Ver3
求直角三角形的斜邊
Discover Topics
Matrices
Logarithm
Division
Boxplot
Quadrilaterals