Answered
Is there any way to make an arc symbol in the equation editor?
Example: 
The closest I can come is using the $\widehat{ABC}$ command in LaTex. That makes the arc over the top 2 segments that come to a point instead of a smooth curve. It suffices in the absence of anything better, but isn't really correct.
Comments (2)
Hey Bruce, would this work?
overset{⏜}{ABC}Thanks for the quick reply Brad. Where did you find the arc symbol to put in the brackets? When I click on insert symbol in the equation editor I don't see it there.
I tried it by copying and pasting from your response. The results are below. It isn't too bad for a minor arc with 2 letters. The major arc with 3 letters is flat on top. I like the smooth curve from MathType in my original post best, but this is probably better than the pointed widehat that I used. At least it is curved on the ends.