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欧拉线与九点圆
Author:
吕胜
GeoGebra
New Resources
柱體建築師
兩位數除以一位數（一）
【案例】2018年全国1卷理科12题
【案例】圆柱体内放置一个大球六个小球
兩位數除以一位數（二）
Discover Resources
waaachen
均分除法（分數÷整數）
Quiz on Solving Compound Inequalities 解複合不等式：測驗
Opening Box
平行四边形个数
Discover Topics
Isosceles Triangles
Statistical Characteristics
Cone
Vectors
Trapezoid