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正十二面體
Author:
侯杰材
正十二面體
GeoGebra
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異分母分數減法
兩位數除以一位數（二）
兩組對邊相等和有直角的四邊形
畫出對稱圖形
GeoGebra笔记功能体验课件
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畢氏定理的證明(三移動)
Angles in pyramid
线性方程组
Lab 2 Correction
翰林數學_2下_CH3-2_SSS作圖
Discover Topics
Statistics
Matrices
Arithmetic Operations
Quadrilaterals
Perimeter