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Author:
KululuDragon
GeoGebra
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兩組對邊相等的四邊形
拼砌四邊形
四邊形的特性
異分母分數減法
三位數除以一位數（二）
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繪製平行四邊形
塗色02
gjc091a27 三角形旋轉
解題一
高中物理电磁学·磁聚焦
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Geometric Distribution
Area
Angles
Limits
Set Theory