Question

英文数学题

A builder wants to run a power line from the main line to his office site. On the site plan the office is located at (25, 18) while the main power line runs through the points (1, 5) and (29, 12). At what point should the builder connect to the main power line? What length of cable will he need?

Answer 1

题目大意为：要从主电线中向办公室牵出一根电线，办公室的坐标是（25，18），主电线从（1，5）点到（29，12），应该在哪一点连接主电线？需要多长的电缆？

如下图所示，可以设所求点坐标为（x,y），利用垂直关系写出方程，解出点坐标，即可。

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