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五上-CP4-第三节平行四边形面积1
Author:
冉献伟
GeoGebra
New Resources
拼砌四邊形
兩位數除以一位數（二）
兩組對邊相等的四邊形
第八周作业
畫出對稱圖形
Discover Resources
VV圓
根號n的做圖法之二
外心
S2 Angles Related to Rectilinear Figures
畫三角形 題1b 的複本
Discover Topics
Median Value
Tree Diagrams
Linear Programming or Linear Optimization
Volume
Reflection