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二面角
Author:
qianqianhouhou
二面角的概念，拖动A、E点改变半平面
GeoGebra
New Resources
近似值：有效數字
sanjiaohanshu
兩位數除以一位數（二）
畫出對稱圖形
三位數除以一位數（一）
Discover Resources
螢橋國中80209傅筱筑
二次函數：係數與圖形的變化
畢氏定理
Orthographic Views 1
点动成线
Discover Topics
Prism
Dilation
Function Graph
Logic
Polynomial Functions