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S2E2A 等腰直角三角形与双垂线

Author:学用数学, acchu

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球體建築師
判斷球體
畫出對稱圖形
找出對稱軸
柱體建築師

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三角形重心
Ex 12C NO.7
圓錐曲線---雙曲線
初犯九點圓
Geometry: Types of Angles 2 (幾何：角的種類 2)
y=x sin(1/x) 的圖形

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