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平行四邊形的面積
Author:
whtong
GeoGebra
New Resources
三位數除以一位數（一）
拼砌四邊形
判斷球體
三位數除以一位數（二）
画直线等分三角形的面积
Discover Resources
雙橢
填滿與旋轉
circle
언제부터인지 몰르겟는데 ..
识货
Discover Topics
Piecewise Functions
Natural Numbers
Integral Calculus
Derivative
Terms