Portal:Mathematics/Featured picture/2010 12

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Picture of the month


Credit: Jujutacular

When produced, corresponding sides of two perspective triangles meet at collinear points along the axis of perspectivity. The lines which run through corresponding vertices on the triangles meet at a point called the center of perspectivity. Desargues' theorem guarantees that the truth of the first condition is necessary and sufficient for the truth of the second.

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