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congruent (SA) 2
Author:
Ricky Chan
GeoGebra
New Resources
柱體建築師
兩組對邊相等的四邊形
兩位數除以一位數（一）
兩位數除以一位數（二）
近似值：有效數字
Discover Resources
Properties of Inequalities 不等式的加法與乘法性質
Relationship between Volume and Surface Area of a Sphere 球體的體積與表面面積的關係
足迹
我的第一个GGB绘本
operations of matrix 2rd ver
Discover Topics
Statistical Characteristics
Geometric Distribution
Translation
Logarithm
Circle