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證平行四邊形 (對角線互相平分) (對邊 // 且相等)
Author:
W.L. Wong, Albert
GeoGebra
New Resources
畫出對稱圖形
拼砌四邊形
四邊形的特性
兩位數除以一位數(二)
兩組對邊相等的四邊形
Discover Resources
圓形與相似形
正四面體
分數(二)
各種五邊形
椭球面
Discover Topics
Boxplot
Geometric Transformations
Tree Diagrams
Rectangle
Rhombus