Distance from a Point to a Line

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In the graph, is the distance from to the line . Because the red and green triangles are similar, .

Contributed by: Soledad Mª Sáez Martínez and Félix Martínez de la Rosa (March 2011)
Open content licensed under CC BY-NC-SA



R. L. Eisenman, "An Easy Way from a Point to a Line," Mathematics Magazine, 42(1), 1969 pp. 40–41.

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