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三角形3,4,5
Author:
Ho-Kai Chen
設P是正角形ABC內一點, PC=3,P=4,PB=5, 試求此正三角形的邊長.
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【案例】2018年全国1卷理科12题
画直线等分三角形的面积
直角坐標平面上的旋轉變換
拼砌四邊形
畫出對稱圖形
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和的完全平方
Angle between 2 planes in a cube
圖形周界_F
黄金螺线
探究
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Median Line
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