ORIGINAL: abufletcher
That method is a little different from what the taught me in high school (you know, bisect the dinosaur with a antelope bone)...but it looks just as troublesome.
yes it is, that's why we do the srtaight line, bissect with a square, then measure to center.
you asked for the compass method though.............takes 15 seconds to do it the CM way
look at the 4th image uploaded above and that's what i am talking about.
once you have those 2 lines, it's done.