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圖形的周界
Author:
spkwan
GeoGebra
New Resources
找出對稱軸
錐體建築師
球體建築師
球体的体积推导（优化版）
第八周作业
Discover Resources
parallelogram
Quiz on Addition and Subtraction of Directed Numbers (2) 有向數加減測驗(2)
正三角形內部一點
活工(一)Q3
三角形的构成 的複本
Discover Topics
Standard Deviation
Dilation
Definite Integral
Subtraction
Division