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平行四邊形面積
Author:
官長壽(longlife)
GeoGebra
New Resources
畫出對稱圖形
兩組對邊相等的四邊形
【案例】圆柱体内放置一个大球六个小球
算柱 (兩位數)
兩位數除以一位數（二）
Discover Resources
精神堡壘
畢式定理 (09)
正多邊形柱體表面積展開圖
「相似三角形」任务5的副本
时钟
Discover Topics
Geometry
Ratios
Limits
Vectors 3D (Three-Dimensional)
Planes