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几何体
Author:
DongHai Zhang
预习相关知识
GeoGebra
New Resources
三位數除以一位數（二）
第八周作业
畫出對稱圖形
異分母分數減法
兩組對邊相等和有直角的四邊形
Discover Resources
正多面體
摺紙1
Two lines
venn图
congruent triangle2_provided by Mr Yeung Kar Chun
Discover Topics
Reflection
Parallelogram
Cuboid
Random Variables
Mode