2PP: Viewpoint on a semicircle

作者：loganm

Using the fact that a triangle inscribed in a circle with one side on a diameter is a right triangle, we find the viewpoint is on a semicircle between the principle vanishing points!

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Graad_10_Rasionale_en_irrasionale_getalle
Translation screensave
calculate the derivative graphically
day 111

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直方圖
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相似三角形
百分率

2PP: Viewpoint on a semicircle

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