Sorry if this is a newbie question but I looked through the help files and couldn't find an answer.

Is there any way to mirror a sketch onto another plane?

I have a sketch that is offset from the front plane by say 4". I can copy the sketch in the feature manager then paste it onto another plane.

The problem with that is if I modify it on one plane, it doesn't modify on the another.

I've been able to select each line segment and make an equal relation but it's a pain when there's so many lines.

I can't mirror just the features because I want to use the points in the sketch to define another plane. Any help would be appreciated. Thanks.