i need the answer

A trick to remember this is that of all the segments that you are learning (perpendicular bisector, angle bisector, medians, altitudes), perpendicular bisector has the most C's in it. Therefore, it corresponds with the point of concurrency with the most C's- Circumcenter.

Also, if you draw the perpendicular bisectors, then you are able to circumscribe the traingle using the circumcenter as the center of your circle.