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沪教版练习册7.4第4题
Author:
吴兴海
GeoGebra
New Resources
小数 的副本
錐體建築師
柱體建築師
算柱 (兩位數)
兩位數除以一位數（一）
Discover Resources
空間中兩向量夾角
圆在多边形上滚动
congruent (SSS)
学习 CAS 计算器
cube(方块堆叠)
Discover Topics
Real Numbers
Fractal Geometry
Right Triangles
Solids or 3D Shapes
Statistical Characteristics