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（二）认识三角形和四边形
Author:
玖玖
GeoGebra
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兩組對邊相等和有直角的四邊形
錐體建築師
四邊形的特性
Claude 解幾何題
算柱 (兩位數)
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正七邊形
P6 圓周03C
Circle
自由落体
根據百分率找數量（二）: 例4的副本
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Linear Regression
Sphere
Orthocenter
Logic
Pyramid