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平面直角坐标系
Author:
欧几里得
GeoGebra
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【案例】2018年全国1卷理科12题
拼砌四邊形
四邉形 (四年級) 教師版
画直线等分三角形的面积
找出對稱軸
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賺賠：例1
指數函數的圖形(2)
三角形外心
擲銀實驗
拋物線1--焦點法
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Equations
Means
Logarithm
Rhombus
Solids or 3D Shapes