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q5-9
Author:
johnmayhk
GeoGebra
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兩組對邊相等和有直角的四邊形
畫出對稱圖形
錐體建築師
球體建築師
GeoGebra笔记功能体验课件
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三角形面積與內切圓半徑
GeoGebra資料上傳
文字工具：設定旋轉文字位置
-3 ≤ cosA+cosB+cosC ≤ 3/2
拋物線4--平行四邊形法
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Combinatorics
Perimeter
Fractions
Rational Numbers
Pythagoras or Pythagorean Theorem