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三角形面积
Author:
王广喜
GeoGebra
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兩組對邊相等和有直角的四邊形
【案例】2013年安徽高考15题
GeoGebra笔记功能体验课件
三位數除以一位數（一）
畫出對稱圖形
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love
combos ()
圓_Collection
tytyty
指数函数的副本
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Root
Isosceles Triangles
Equations
Orthocenter
Volume