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S2E2A 等腰直角三角形与双垂线
Author:
学用数学
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acchu
GeoGebra
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球體建築師
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畫出對稱圖形
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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