两个歪斜线之间的最短距离G.ydF4y2Ba

找到以下两行之间的最短距离G.ydF4y2Ba ${g} _ {1}G.ydF4y2Ba$和G.ydF4y2Ba ${g} _ {2}：G.ydF4y2Ba$

$\ begin {对齐} {g} _ {1}＆：\ frac {x-3} {2} = \ frac {y + 1} { - 2} = z-2 \\ {g} _ {2}＆：x = \ frac {y} {2} = -Z + 4。\结束{对齐}G.ydF4y2Ba$