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正三角形在长方形边上移动加滚动
Author:
赵林
GeoGebra
New Resources
算柱 (兩位數)
【案例】圆柱体内放置一个大球六个小球
第八周作业
三位數除以一位數（二）
【案例】2018年全国1卷理科12题
Discover Resources
向量相加
Circle Properties
AREA
配方法 Completing the Square
Rotational and reflectional symmetry of a regular polygon
Discover Topics
LCM and GCD
Correlation
Terms
Logarithmic Functions
Sequences and Series